Painting & Pest control
Paint has to:
• keep rain out of substrates
• breathe when it's on the outside or on the inside
• protect substrates from getting a sunburn
• look nice
Concerns...
Pest Control...
Cement & Concrete...
Concerns
Exposure to sunlight (ultraviolet radiation), moisture and heat are the major factors affecting the durability of paint coatings and the durability of substrates (wood, plastics, etc.). Recall that UV, water and heat are "damage functions." Although, each factor can independently lead to deterioration, the effect of the combination of the three factors is much more severe than each factor separately. Ultraviolet radiation, moisture and heat can each lead to the breakdown of the resin in painted surfaces which binds (holds) the pigment to the substrate surface. When the resin breaks down, pigment is lost (washed away from the surface) and fading occurs. In some instances, rubbing the surface with a cloth or a hand will remove a white powder from the paint surface (chalking).
Apply good quality paint on the surface regularly to avoid major repairs in future.
Paints available in different qualities which are as follows:
Cement based paints
Semi Acrylic paint
100% Acrylic paint
Conventional approach to pest control refers to eradication, completely eliminating an organism from the environment. Pest control in integrated pest management (IPM) is to limit the growth of pest populations to below economically damaging levels.
Method of keeping down the numbers and/or distribution of species that are invasive or intrusive on other species. Certain practices used in 'pest control' are pesticides and hunting.
Pest control refers to the regulation or management of another species defined as a pest, usually because it is detrimental to a person's health, the ecology or the economy.
Cement
Bricklayer Joseph Aspdin of Leeds, England first made portland cement early in the 19th century by burning powdered limestone and clay in his kitchen stove. By this crude method he laid the foundation for an industry which annually processes literally mountains of limestone, clay, cement rock, and other materials into a powder so fine it will pass through a sieve capable of holding water. Cement is so fine that one pound of cement contains 150 billion grains .
Portland cement , the basic ingredient of concrete, is a closely controlled chemical combination of calcium, silicon, aluminum, iron and small amounts of other ingredients to which gypsum is added in the final grinding process to regulate the setting time of the concrete. Lime and silica make up about 85% of the mass. Common among the materials used in its manufacture are limestone, shells, and chalk or marl combined with shale, clay, slate or blast furnace slag, silica sand, and iron ore.
Each step in manufacture of portland cement is checked by frequent chemical and physical tests in plant laboratories. The finished product is also analyzed and tested to ensure that it complies with all specifications.
Concrete
In its simplest form, concrete is a mixture of paste and aggregates. The paste, composed of portland cement and water, coats the surface of the fine and coarse aggregates. Through a chemical reaction called hydration, the paste hardens and gains strength to form the rock-like mass known as concrete.
Within this process lies the key to a remarkable trait of concrete: it's plastic and malleable when newly mixed, strong and durable when hardened. These qualities explain why one material, concrete, can build skyscrapers, bridges, sidewalks and superhighways, houses and dams.