Preparation method and application of modified rubber particles, frost-resistant permeable concrete and its application, and frost-resistant permeable brick and its preparation method
A technology of permeable concrete and modified rubber, applied in the field of frost-resistant permeable concrete, frost-resistant permeable bricks and their preparation fields, can solve the problems of reduced concrete bonding force, reduced compressive strength, poor bonding degree, etc., and can increase the surface area. Toughness, strong bonding, and the effect of enhancing compressive and flexural strength
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[0022] The invention provides a kind of preparation method of modified rubber particle, comprises the steps:
[0023] Mixing the rubber particles and a surface treatment agent for surface coating treatment to obtain rubber particles coated with a surface treatment agent; the surface treatment agent includes the following components by weight: 15 to 35 parts of water glass, 2 parts by weight of silicon phosphate ~6 parts, 50~75 parts of silica powder, 0.1~1 part of urea, 0.1~2 parts of hydroxypropyl methylcellulose, described water glass is sodium silicate aqueous solution or potassium silicate aqueous solution, the quality of described water glass The concentration is 10-55%;
[0024] The rubber particles coated with the surface treatment agent are subjected to curing reaction at 40-60° C. for 1-3 hours to obtain modified rubber particles.
[0025] The invention mixes the rubber particles and the surface treatment agent, performs surface coating treatment, and obtains the rub...
Embodiment 1
[0062] (1) Preparation of modified rubber particles:
[0063] According to parts by weight, 24 parts of water glass (sodium silicate aqueous solution, mass concentration is 30%, Baume degree is 35.2°Bé), 4 parts of silicon phosphate, 71.4 parts of silica powder (particle diameter ≥ 325 mesh), urea 0.3 parts are mixed with 0.3 parts of hydroxypropyl methylcellulose to obtain a surface treatment agent;
[0064] Mix waste tire rubber particles (elastic modulus of 0.02GPa, particle size of 0.5-0.9mm) and the surface treatment agent according to the mass ratio of 1:2 at a speed of 30rpm for 2 hours, and then pass through a 20-mesh sieve to obtain Rubber particles coated with a surface treatment agent;
[0065] Curing the rubber particles coated with a surface treatment agent at 50° C. for 3 hours to obtain modified rubber particles;
[0066] (2) Preparation of frost-resistant permeable bricks:
[0067] Mix the following components by weight to obtain the permeable base concrete:...
Embodiment 2
[0074] (1) Preparation of modified rubber particles:
[0075] According to parts by weight, 24 parts of water glass (sodium silicate aqueous solution, mass concentration is 30%, Baume degree is 35.2°Bé), 5 parts of silicon phosphate, 69 parts of silica powder (particle diameter ≥ 325 mesh), urea 0.5 part is mixed with 0.5 part of hydroxypropyl methylcellulose to obtain a surface treatment agent;
[0076]Mix waste tire rubber particles (elastic modulus of 0.025GPa, particle size of 0.9-1.5mm) and the surface treatment agent according to the mass ratio of 1:2.5 at a speed of 30rpm for 2 hours, and then pass through a 14-mesh sieve to obtain Rubber particles coated with a surface treatment agent;
[0077] Curing the rubber particles coated with a surface treatment agent at 60° C. for 2 hours to obtain modified rubber particles;
[0078] (2) Preparation of frost-resistant permeable bricks:
[0079] Mix the following components by weight to obtain the permeable base concrete: 18...
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