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Formula of salt-frost-resistant gravel concrete curb and preparation method of curb
The invention discloses a formula of salt-frost-resistant gravel concrete curb and a preparation method of curb. In the raw materials, a cementing material is P.042.5 ordinary silicate cement and mineral admixture, consumption of the cementing material is 350 to 400 kg/m<3>, the mineral admixture is 25 to 35 percent by weight of the total amount of the cementing material, a grade-I coal powder and S95 mineral powder respectively accounts for 50 percent by weight of the mineral admixture, and the water-cement weight ratio is 0.35 to .040; the doping amount of a water reducing agent is 0.20 to 0.25 percent by weight of the cementing material, and the consumption of an air entraining agent is 0.008 to 0.010 percent by weight of the cementing material; the surface of the curb is coated with an organic film-forming coating. Gravels are adopted as the concrete curb aggregate, the resource can be adequately utilized, and the damage of natural environment can be reduced. By optimizing the concrete raw material proportion, doping the air entraining agent and smearing multiple layers of coatings on the surface of concrete, the salt frost resistance can be greatly improved, the 28d pressure resisting strength is more than or equal to 35MPa, the mass loss rate after the curb is circularly frozen by salt for 300 times is less than or equal to 3.0 percent, the frozen damage risk of the curb can be greatly reduced, the service life of the concrete curb can be greatly prolonged, the resource is saved, and the economic benefit is good.
Formula of salt-frost-resistant gravel concrete curb and preparation method of curb
The invention discloses a formula of salt-frost-resistant gravel concrete curb and a preparation method of curb. In the raw materials, a cementing material is P.042.5 ordinary silicate cement and mineral admixture, consumption of the cementing material is 350 to 400 kg/m<3>, the mineral admixture is 25 to 35 percent by weight of the total amount of the cementing material, a grade-I coal powder and S95 mineral powder respectively accounts for 50 percent by weight of the mineral admixture, and the water-cement weight ratio is 0.35 to .040; the doping amount of a water reducing agent is 0.20 to 0.25 percent by weight of the cementing material, and the consumption of an air entraining agent is 0.008 to 0.010 percent by weight of the cementing material; the surface of the curb is coated with an organic film-forming coating. Gravels are adopted as the concrete curb aggregate, the resource can be adequately utilized, and the damage of natural environment can be reduced. By optimizing the concrete raw material proportion, doping the air entraining agent and smearing multiple layers of coatings on the surface of concrete, the salt frost resistance can be greatly improved, the 28d pressure resisting strength is more than or equal to 35MPa, the mass loss rate after the curb is circularly frozen by salt for 300 times is less than or equal to 3.0 percent, the frozen damage risk of the curb can be greatly reduced, the service life of the concrete curb can be greatly prolonged, the resource is saved, and the economic benefit is good.
Formula of salt-frost-resistant gravel concrete curb and preparation method of curb
LI GUO (author) / DU JIANMIN (author) / WU XIAOSUO (author) / YANG BOYUAN (author)
2015-09-23
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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