The concrete formula @ reinforced concrete corrosion in case of strong corrosive medium, even if the concrete does not crack infiltration is not also been eroded concrete unreacted completely free calcium and cement hydration product of calcium silicate, aluminum, calcium, iron and aluminum acid calcium dissolved in the acidic ion, the precipitation of calcium hydroxide, and then to produce a second reaction with the acidic ion, calcium sulfate, calcium carbonate, calcium oxide is generated, these reactants are hardened, but not in the case of wet expansion, leading to cracking in concrete , hollowing, excoriation, chalking; concrete is a porous structure, the corrosion medium will rapidly penetrate into the concrete, and the the concrete free calcified reaction generate ettringite expansion crystals, the concrete cracking. Aka waterproof fine: the brush in bamboo baskets, bamboo baskets can draw water! Cost of $ 2,000 / ton, the market price at $ 8,000 / ton. Also known as water repellent: spray with a sprayer in red brick, the rainwater call up is like playing in a lotus leaf, natural rolled away! Costs 4 yuan / ton, the market price of 20,000 yuan / ton. Ming Nami the insulation agent: wiping the window glazing, summer heat, winter insulation, high adhesion, easy to dry, long life, insulation, waterproof, fire-retardant, self-cleaning, environmentally friendly paint, coating automotive glass, decorative glass, window glass, light transmission rate of up to 90%, can effectively inhibit the radiant heat of the sun and infrared solar heat reflection rate was 95% thermal conductivity for 0.03W/mK., insulation inhibition efficiency up to 90%! costs 4 yuan / ton, the market price of 20,000 yuan / ton. Elastic waterproof coating, also known as self-healing: the knife pierce and then pulled out of the paint, the incision healed quickly watertight cm can be stretched 20 cm, the cost price of 5 yuan / ton, the market price of 30,000 yuan / ton. Aka mortar king: per ton mortar king instead of one thousand tons of lime, Province Cement, cost three hundred retail price of three thousand!