A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The invention discloses a crack-resistant additive for cement. The crack-resistant additive comprises, by weight, 20-30 parts of polyvinyl chloride, 4-6 parts of slag powder, 4-6 parts of silica fume, 1-2 parts of vinyl acetate, 0.6-0.8 parts of a silane coupling agent, 3-5 parts of glass fibers, 0.4-0.7 parts of a polycarboxylic acid water reducer with a concentration of 15%, 2-2.3 parts of dibutyl phthalate, 2-4 parts of a metal additive and 1.5-2.5 parts of an inorganic additive. Waster slag powder is used so that waste is changed into valuables. Under the action of the silane coupling agent, the slag powder and polyvinyl chloride can be well bonded so that water stability is good and cement water resistance is greatly improved. The metal additive and the inorganic additive have good cement crack resistance. The coating does not produce any cracks in initial drying, bonding strength is greater than 0.5MPa and cement environment affinity is improved.
The invention discloses a crack-resistant additive for cement. The crack-resistant additive comprises, by weight, 20-30 parts of polyvinyl chloride, 4-6 parts of slag powder, 4-6 parts of silica fume, 1-2 parts of vinyl acetate, 0.6-0.8 parts of a silane coupling agent, 3-5 parts of glass fibers, 0.4-0.7 parts of a polycarboxylic acid water reducer with a concentration of 15%, 2-2.3 parts of dibutyl phthalate, 2-4 parts of a metal additive and 1.5-2.5 parts of an inorganic additive. Waster slag powder is used so that waste is changed into valuables. Under the action of the silane coupling agent, the slag powder and polyvinyl chloride can be well bonded so that water stability is good and cement water resistance is greatly improved. The metal additive and the inorganic additive have good cement crack resistance. The coating does not produce any cracks in initial drying, bonding strength is greater than 0.5MPa and cement environment affinity is improved.