Natural paints: what are the ways to make them

WHAT ARE NATURAL PAINTS? 

What makes them Eco-Friendly?

Natural paints, also known as eco-friendly paints or organic paints, are paints that are made from natural, non-toxic ingredients and do not contain harmful chemicals or volatile organic compounds (VOCs) which unlike conventional paints do not contain synthetic chemicals that can release harmful fumes, and contribute to indoor air pollution.

Benefits of natural paints include:

• Environmentally friendly: Natural paints are generally made from renewable resources, reducing the impact on the environment compared to conventional paints with high chemical content.
• Low VOC emissions: Since natural paints have little to no VOCs, they contribute to healthier indoor air quality and are less harmful to occupants, especially those with respiratory sensitivities.
• Biodegradable: Natural paints are often biodegradable and can break down more easily in the environment compared to synthetic paints.
• Aesthetic appeal: Natural pigments can provide unique and subtle colors, giving a natural and warm appearance to the painted surface.

Basics of Natural paints.

The primary components of natural paints typically include:

1. Pigments: Natural pigments are derived from minerals, plants, and other natural sources. They provide color and opacity to the paint.
   Binders: The binder is the adhesive component that holds the pigment particles together and helps them adhere to surfaces. In natural paints, binders are usually made from natural materials such as linseed oil, beeswax, plant oils, or casein (milk protein).
   Solvents: Natural paints often use water as the solvent, which means they are water-based and have low or no VOC content. This is in contrast to conventional paints that use chemical solvents which can release harmful fumes.

   Additives: Natural paints may include small amounts of natural additives like clay, chalk, or talcum for specific properties like texture, durability, or drying time.

What are some natural materials that we can create paints from?

Fruits: 

• Blueberries:  shades of blue and purple.
• Raspberries:  pink and red pigments.
• Strawberries: red and pink hues
• .Blackberries: purple and blue tones
• .Pomegranate:  brown and gray pigment
• Cherries:  red and pink pigments.
• Grapes:  purple pigments.
• Cranberries: f red and pink.
• Elderberries:  dark purple and black pigments.
• Oranges: orange pigments.
• Lemons: yellow pigments.
• Grapefruits: pink and yellow hues.
• Plums:  purple and pink pigments.
• Blackcurrants:  dark purple pigments
• Red currants: red pigments.

Vegetables:

• Beets: shades of pink and red.
• Carrots:  orange pigment.
• Spinach: green pigments.
• Red Cabbage: blue and purple pigments.
• Turmeric: vibrant yellow pigment.
• Onions: yellow and brown pigments.
• Pumpkins: orange and yellow hues.
• Sweet Potatoes:  earthy tones.
• Red Peppers:  red and orange pigments.
• Kale: green pigments.
• Tomatoes:  red and pink hues.
• Purple Potatoes:  purple pigments.
• Saffron: rich yellow pigment.
• Parsley: green pigments.
• Red Radishes: red and pink pigments.

Flowers:

• Marigold: yellow and orange pigments.
• Hibiscus:  vibrant red and pink hues.
• Lavender:  light purple and lavender pigments.
• Rose:  pink and red.
• Chrysanthemum:  yellow and green pigments.
• Sunflower:  yellow and brown pigments.
• Dahlia: reds, yellows, oranges, and pinks.
• Cornflower: Cornflowers can produce blue pigments.
• Lilac: Lilac flowers can yield light purple and lavender pigments.
• Pansy:  purple, blue, and yellow pigments.
• Safflower: yellow and orange pigments.
• Chamomile: light yellow pigments.
• Daisy:  white and yellow pigments.
• Nasturtium:  bright red and orange pigments.
• Butterfly Pea:  flowers can yield blue pigments that can change color depending on the pH of the solution.

The basic technique to extract colors from fruits, vegetables, and flowers is the same. The following is a step-by-step guide on how to extract pigments from vegetables:

1. Prepare the vegetables: Wash and chop the vegetables into small pieces to increase the surface area and facilitate color extraction.
2. Boiling or Simmering: Place the chopped vegetables in a pot and add enough water to cover them. Bring the water to a boil and then reduce the heat to a simmer. Allow the vegetables to simmer for an extended period to release their color into the water. The exact time required may vary depending on the vegetable and the desired intensity of the color.
3. Mash or Blend (Optional): To further enhance color extraction, you can mash or blend the vegetables after they have been simmered. This step is optional and can be skipped if the simmering process has already yielded the desired color.
4. Strain the liquid: Once the desired color is achieved, strain the liquid to separate the vegetable solids from the colored liquid. You can use a fine mesh strainer or cheesecloth for this purpose.
5. Adjust the pH (Optional): Depending on the vegetable used, you may choose to adjust the pH of the colored liquid to achieve different shades. For example, adding a small amount of vinegar or lemon juice can make the color more vibrant, while adding baking soda can make it more alkaline.
6. Use as a dye or paint: The extracted vegetable color can now be used as a natural dye for fabrics or other materials. It can also be mixed with a natural binder like water, linseed oil, or casein to create paint for artistic purposes.

 

In a different blog, we explore the existing traditional plasters practised in the different parts of India. 

 

Roofing For Mud House

 Sustainable roofing technique for mud house

In a mud house, there are several roofing options that are well-suited to complement the natural and sustainable aspects of the building. The choice of roofing will depend on the local climate, available resources, budget, and design preferences. Here are some common roofing options for mud houses:

1. Thatched Roof:

Thatched roofs are made from natural materials such as straw, reeds, or grass. They provide excellent insulation and ventilation, making them ideal for hot and humid climates. Thatched roofs have a rustic and traditional appeal that complements the earthy aesthetics of a mud house.

2. Earthen Roof:

An earthen roof is made by compacting a mixture of soil, sand, and clay over a wooden or bamboo framework. This type of roof seamlessly integrates with the mud house's walls, creating a cohesive and natural appearance. Earthen roofs offer good thermal performance and can be an economical and environmentally friendly choice.

3. Bamboo Roofing:

Bamboo is a sustainable and lightweight material that can be used for roofing. It is durable, easy to work with, and readily available in many regions. Bamboo roofs can be designed with various styles, including bamboo shingles or thatch-like panels.

4. Green Roof:

A green roof involves planting vegetation on the roof surface. It not only provides natural insulation but also contributes to rainwater retention and promotes biodiversity. Green roofs can be implemented using appropriate waterproofing and drainage systems.

5. Corrugated Metal Sheets:

For a more durable and long-lasting option, corrugated metal sheets can be used. They provide protection against rain and other elements and can be installed with proper insulation to control interior temperatures.

6. Recycled Roofing Materials:

In some regions, people repurpose discarded materials like old tires, salvaged metal, or reclaimed wood to create unique and eco-friendly roofing solutions for their mud houses.

When selecting a roofing option for your mud house, it's essential to consider factors such as the local climate, availability of materials, the overall aesthetic you want to achieve, and your budget. Proper installation and maintenance of the chosen roofing will ensure its longevity and effectiveness in protecting your mud house for years to come.

check out our other blogs to know how to construct these kind of roofs

Adobe House: Future of sustainability

Adobe Construction: Is it a true replacement for concrete construction

Adobe Construction offers several advantages that make it a desirable choice for certain regions and building projects. Here are some reasons why adobe construction is preferred:

1. Sustainable and Environmentally Friendly: Adobe is made from natural and locally available materials such as clay, sand, and straw. Its production has a minimal impact on the environment, and it is a renewable and sustainable building material.

2. Energy Efficiency: Adobe bricks have high thermal mass, which means they can absorb and store heat during the day and release it slowly at night. This property helps maintain a comfortable indoor temperature, reducing the need for heating and cooling systems and saving energy.

3. Cost-Effective: Adobe construction can be more cost-effective, especially in regions where the raw materials are readily available. It often requires less energy-intensive manufacturing processes than modern construction materials.

4. Non-Toxic and Healthy: Adobe does not contain harmful chemicals or off-gas, making it a healthier option for occupants. It helps maintain good indoor air quality and can be suitable for people with allergies or sensitivities.

5. Fire Resistance: Adobe has excellent fire resistance due to its high clay content. It provides better protection against fire hazards compared to other construction materials.

6. Aesthetics and Cultural Heritage: Adobe buildings often have a unique and charming appearance, reflecting the cultural heritage of the region. Many people appreciate the traditional and earthy aesthetics of adobe structures.

7. Local Skill Development: Adobe Construction promotes the use of traditional building techniques and can help preserve local craftsmanship and building knowledge.

8. Low Embodied Carbon: Adobe has a low carbon footprint as it requires minimal energy for production, resulting in reduced greenhouse gas emissions compared to energy-intensive materials like concrete or steel.

Despite these advantages, it's essential to consider the specific context and climate of the construction site. Adobe construction may not be suitable for areas with high rainfall or regions prone to earthquakes, as it has limitations in terms of water resistance and seismic performance. Proper design, maintenance, and protection against the elements are crucial for the longevity and performance of adobe structures. Therefore, before choosing adobe construction, a thorough assessment of local conditions and building requirements is necessary to ensure its suitability and durability.

Adobe Construction

In this blog post, we will walk you through the step-by-step process of making Adobe bricks and constructing your very own Adobe structure. Let's embark on this rewarding journey that nurtures both tradition and sustainability!

Step 1: Gather the Materials

To start your adobe construction, collect the essential materials:

• The best kind of soil to start your adobe construction is Loamy Soil-
                        25-30% clay, 40-50% silt, and 20-30% sand
• If you have Clay-rich soil: Add sand to the mix to enhance the bricks' structural strength.
• If you have sandy soil; check out our blog to see how you can ensure its suitability for construction.
• Straw: The straw reinforces the adobe bricks and prevents cracking during the drying process.
• Water: Just the right amount is crucial to achieving the perfect Adobe consistency.

Step 2: Prepare the Adobe Mix

1. Clear a flat area and spread out a tarp to protect the soil from debris or contamination.
2. Combine the soil, sand, and straw in the below-mentioned ratio
3. Soil: 70-80% by volume
4. Water: 15-20% by volume
5. Straw: 5-10% by volume
   • Add these on the tarp. Gradually add water while mixing the ingredients with your feet or a shovel. Use your bare feet to detect lumps and consistency of the adobe mix. Aim for a dough-like consistency that holds its shape without being too wet.

Step 3: Mold the Adobe Bricks

1. Create brick molds using wood or metal frames. The standard size is around 14 x 10 inches and 4 inches in thickness.
2. Fill the molds with the adobe mix, ensuring even distribution and compaction. Level the top surface for a smooth finish.
3. Carefully remove the molds, leaving the formed bricks to dry on the tarp.

Step 4: Drying and Curing

1. Allow the adobe bricks to dry in the shade for 1-2 days, depending on the weather conditions. This initial drying period is crucial to prevent cracks.
2. Turn the bricks on their sides to continue drying for another 5-7 days. Rotate them daily to ensure even drying and minimize warping.

Step 5: Building the Adobe Structure

1. Plan the layout and design of your adobe structure, whether it's a small garden wall or a cozy Adobe house.
2. Dig a shallow trench as the foundation and level it for stability.
3. Lay the adobe bricks in the trench, using a mud slurry as mortar to bond the bricks together.
4. Gradually build the walls, ensuring they are level and straight. Use a wooden beam to check for evenness.
5. Allow the walls to dry for a few days before adding the roof structure or additional layers.
6. We'll dive deeper into the construction of adobe structure in further blogs.

Step 6: Finishing Touches

1. Once the walls are dry, smooth any uneven surfaces or cracks with a mixture of adobe, water, and straw.
2. Apply a natural earthen plaster to the interior and exterior walls for a polished look and added protection.
3. Optionally, you can use natural paints or finishes to further enhance the aesthetics and durability of your Adobe creation.

Conclusion:

Embracing the art of adobe construction allows us to forge a profound connection with the past while building a sustainable future. By following this step-by-step guide and infusing creativity into the process, you can construct an adobe structure that stands as a testament to the enduring charm of eco-friendly architecture. Let the timeless beauty of adobe become a symbol of your commitment to tradition and sustainability in today's world. Happy building!

There have been ancient civilizations that built high-rise buildings using adobe bricks, check them out here!

How to make sure your soil is suitable for construction

Soil Stabilization for Sandy Soil

After soil testing if your soil turns out to be more sandy, how do you make it suitable for mud construction?

If the soil at the construction site for mud construction is more sandy than loamy, it can impact the building's stability and performance. However, with proper soil treatment and construction techniques, you can still use sandy soil for mud construction. Here are some steps you can take:

1. Soil Testing: Before proceeding with construction, conduct a soil test to determine the specific characteristics of the sandy soil. This will help you understand its composition and what modifications might be required.

2. Soil Stabilization: Sandy soils can lack cohesion and may not hold together well when used in mud construction. You can stabilize the soil by adding some clay or silt to improve its binding properties. This process is known as soil stabilization.

3. Add Organic Material: Mixing organic material such as straw or rice husks with the sandy soil can enhance its bonding and help prevent cracking and shrinking as the mud dries.

4. Compaction: Properly compact the stabilized soil to increase its density and reduce settling after construction.

It is crucial to work with experienced mud construction professionals who have expertise in dealing with different soil types. They can guide you through the appropriate modifications and construction techniques needed to adapt to the specific soil conditions at your site. Keep in mind that mud construction can be an eco-friendly and sustainable option, and with the right approach, it can be successfully implemented even on sandy soils.

What are Soil Stabilizers and how do they work?

Stabilizing sandy soil involves improving its cohesion and load-bearing capacity to make it suitable for construction or other purposes. Here are some common methods to stabilize sandy soil:

1. Add Clay or Silt: Mixing clay or silt with sandy soil can significantly improve its stability. The clay particles act as a binder, helping to hold the sandy particles together. Aim for a clay content of around 15-25% for good stabilization.

2. Compaction: Proper compaction is essential to increase the density of the sandy soil. Use compactors or rollers to compress the soil particles and reduce air gaps. Compaction improves load-bearing capacity and reduces settlement.

3. Cement Stabilization: Introduce cement into the sandy soil to create a solid and stable material. The cement binds the soil particles together, making it stronger and more durable. Cement stabilization is often used for road bases and building foundations.

4. Lime Stabilization: Lime can be added to sandy soil to improve its plasticity and create a stable material. Lime reacts with the soil particles, enhancing cohesion and reducing permeability. Lime stabilization is commonly used for road construction.

5. Fly Ash Stabilization: Fly ash, a byproduct of coal combustion, can be used to stabilize sandy soil. When mixed with sandy soil, fly ash improves its strength and durability. 

6. Organic Stabilization: Adding organic materials like straw, rice husks, or sawdust to sandy soil can improve its stability. The organic matter enhances cohesion and reduces the risk of cracking and shrinking during drying.

7. Chemical Stabilizers: There are various chemical stabilizers available that can improve the stability of sandy soil. These chemicals react with the soil particles to enhance cohesion and reduce water permeability.

8. Geotextiles: Using geotextiles, which are permeable fabrics, can stabilize sandy soil and prevent erosion. Geotextiles act as a separator between the sandy soil and other materials, maintaining stability.

It's essential to choose the most suitable stabilization method based on the specific requirements and intended use of the stabilized sandy soil. Consulting with a geotechnical engineer or soil stabilization expert is recommended to determine the appropriate stabilization technique for your specific project.

What are some Chemical Stabilisers?

Chemical stabilizers are additives that can be used to improve the engineering properties of soil, enhancing its stability and load-bearing capacity. Here are some common chemical stabilizers used for soil stabilization:

1. Cement: Cement is one of the most widely used chemical stabilizers for soil. When mixed with soil, cement reacts with water to form a strong and durable material. Cement stabilization is commonly used for road construction, building foundations, and stabilization of weak soils.

2. Lime: Lime is another popular chemical stabilizer that improves the plasticity and cohesion of soils. It reacts with the clay particles in the soil, reducing its plasticity and increasing its strength. Lime stabilization is often used for improving the properties of clayey soils.

3. Fly Ash: Fly ash, a byproduct of coal combustion in power plants, can be used as a soil stabilizer. It reacts with the soil particles, improving its strength and reducing its susceptibility to water infiltration. Fly ash stabilization is commonly used for road bases and embankments.

4. Bitumen: Bitumen, a petroleum-based material, can be used to stabilize soil in road construction. It acts as a binder, improving the stability and durability of the soil.

5. Polymers: Certain polymers, such as polyacrylamide, can be used as chemical stabilizers for soil. Polymers can improve soil properties like permeability and compressibility and are often used in soil erosion control and environmental remediation projects.

6. Sodium Silicate: Sodium silicate, also known as water glass, can be used as a soil stabilizer. When applied to the soil surface, it reacts with carbon dioxide in the air and forms a stable and hardened surface.

7. Potassium Chloride: Potassium chloride can be used as a stabilizer for certain types of soils. It can reduce soil swelling and improve its load-bearing capacity.

It's essential to use the appropriate chemical stabilizer based on the specific soil type and engineering requirements of the project. The dosage and mixing procedures should be carried out as per the manufacturer's guidelines and under the supervision of soil stabilization experts or geotechnical engineers. Additionally, proper testing and analysis should be conducted to determine the most suitable chemical stabilizer for the given soil conditions.

Is my soil suitable for mud construction?

 Soil Tests

What are the things to keep in mind while using the soil of your site for mud construction? 
What are some tests you can perform at the site?

Soil tests are a critical step in mud construction, providing essential insights into the soil's composition and suitability for building with natural materials. Conducting comprehensive soil tests is a non-negotiable practice, ensuring the stability, durability, and overall success of mud-based structures.

The ideal proportion may vary based on factors such as climate, the intended use of the construction, and available soil types. However, in general, a soil composition with approximately 25-30% clay, 40-50% silt, and 20-30% sand is often considered suitable for mud construction.

• Clay: The presence of clay in the mud mixture provides excellent binding properties, enhancing the cohesion and strength of the mud. It helps the mud hold its shape and provides durability to the construction. A higher clay content can make the mud more workable and resistant to cracking during drying.
• Silt: Silt contributes to the plasticity of the mud, making it easier to mold and shape. It also adds some cohesion and strength to the mixture. A moderate amount of silt helps in achieving the right balance of workability and stability.
• Sand: Sand adds structural integrity to the mud mixture and helps in reducing shrinkage and cracking. It improves the drainage properties of the mud, preventing waterlogging and improving weather resistance.

1. Visual Soil Inspection: A simple visual inspection can give you an idea of the soil type, color, texture, and presence of any organic matter or debris.
2. Feel Test: The feel test involves taking a small amount of soil and moistening it with water. By rolling the soil between your fingers, you can assess its texture and identify whether it's sandy, silty, or clayey. If the soil feels rough it's more sandy; if it sticks to your fingers it's more clayey.
3. Thumb Penetration Test: again moisten the soil and make a small ball of it. Pressing your thumb into the soil can give you an indication of its hardness and compaction. If the indentation is loose, the soil is sandy. if the indentation is deep and doesn't crumble the soil is clayey
4. Shrink-Swell Test: Place a small amount of soil in a glass jar, add water, and shake it well. Observe the water level over time; significant changes can indicate soil with high shrink-swell potential.
5. Infiltration Test: Dig a hole and fill it with water, then measure how long it takes for the water to drain. This test assesses the soil's permeability.
6. Compaction Test (Hand Test): Compact a small sample of soil by pressing it into a ball with your hands. The level of cohesion will give you an idea of the soil's compaction characteristics.
7. Dry Strength Test: Take a small, dry clump of soil and try to break it apart with your fingers. The ease or difficulty of breaking the clump indicates the soil's strength.
8. Smell Test: Take a small lump of moistened soil and smell it, if it gives out an organic smell, it is most probably loamy soil.

The most indicative of the amount of sand, silt, clay, and organic matter in your soil is the jar test/ dispersion test, or most commonly known BOTTLE TEST!

Materials Needed: Soil sample

                                Clear glass bottle or jar with a lid

                                Water

                                Ruler or measuring tape

Procedure:

• Obtain a Representative Soil Sample:

Collect a representative soil sample from the site using a soil auger or shovel. Ensure that the sample is free of debris, stones, and organic matter.

• Air-Dry the Soil Sample:

Spread the collected soil sample in a thin layer on a flat, clean surface and leave it to air dry for a few hours or overnight. Make sure the soil is completely dry before proceeding.

• Crush Aggregates (if present):

If the soil sample contains aggregates or larger particles, crush them into smaller pieces using a pestle and mortar. The soil should have a uniform texture before proceeding.

• Fill the Bottle with Soil:

Fill approximately one-third of the glass bottle with the dried and crushed soil sample. Try to avoid trapping air bubbles while filling.

• Add Water to the Bottle:

Add water to the bottle until it is about two-thirds full, covering the soil. The water level should be well above the soil level.

• Shake Vigorously:

Tightly close the lid of the bottle and shake it vigorously for at least 5 minutes. Ensure that the soil particles are completely dispersed in water.

• Settle and Observe:

Allow the bottle to stand undisturbed for a significant period, such as 24 hours. Observe the layers that have formed in the bottle after the settling period.

• Interpret the Results:

After the settling period, the soil particles would have settled into distinct layers. The bottom layer represents the sand, the middle layer represents the silt, and the top layer represents the clay.

• Measure the Layers:

Using a ruler or measuring tape, measure the thickness of each layer in the bottle. Note down the measurements for each layer.

• Calculate the Percentage:

Calculate the percentage of each layer by dividing its thickness by the total height of the soil column in the bottle and multiplying by 100.

 mason jar test: credits rcoolguides

 

Click here to find out what to do if your soil turns out unsuitable for construction!