Paints and Varnishes as Used in Civil Engineering

History of use of paints

Paint is any colored liquid which on drying, form a thin surface coat and has specific functions t perform. Paints are used to protect metals, timber, or plastered surfaces from the corrosive effects of weather, heat, moisture or gases etc and... [Read More]

1. Body
2. Vehicle
3. Pigment
4. Thinner
5. Dryers

Paint can be applied as a solid, a gaseous suspension (aerosol) or a liquid. Techniques vary depending on the practical or artistic results desired... [Read More]

• Base/body is thoroughly grounded in the vehicle
• Mixed with the thinner to impart necessary workability
• Pigments and dryers are separately mixed to a thin consistency
• The two are then thoroughly mixed to form the desired paint

Properties of Paints

Test on Paints

Before painting, wood siding and trim should be treated with a paintable water-repellent preservative or simple water repellent. This can be done by brush after the siding or trim is up, or by dipping before it’s installed.

If you work by brush, all lap and butt joints in solid wood or all panel edges should be especially well saturated. Allow at least two warm, sunny ... [Read More]

Varnishes are more or less transparent liquids which are used to provide a protective surface coating in much the same way as paints do” At the same time they allow the original surface to show but add a lustrous and glossy finish to it. All varnishes have basically the same .... [Read More]

1. Varnishes
2. Plasters
3. Distempers

There are a number of ways to judge paint quality:... [Read More]

1. Wearability
2. Covering ability
3. Ease of cleaning
4. Protection of the substrate
5. Environmentally Friendly
6. Aesthetic
7. Practical and Cost Effective