Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Formula of salt-frost-resistant crushed stone aggregate concrete curb and preparation method of curb
The invention discloses a formula of salt-frost-resistant crushed stone aggregate curb and a preparation method of curb. In 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 of the total amount of the cementing material, the 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 0.40; thee doping amount of a water reducing agent is 0.25 to 0.20 percent of the cementing material, and the consumption of an air entraining agent is 0.008 to 0.010 percent of the cementing material; the surface of the curb is coated with an organic film-forming coating. By adopting the crushed stone aggregate, optimizing the raw material proportion, doping appropriate amount of air entraining agent and taking surface anticorrosion treatment, the product has characteristics of good mixability of newly-mixed concrete, high forming quality, less consumption of cement, high strength, high frost resistance and the like. The 28-day pressure resisting strength is more than or equal to 40MPa, and the loss rate of the mass after the curb is circularly frozen by salt for 300 times is less than 2 percent. The frost risk of the concrete curb is greatly reduced, the service life of the concrete curb is greatly prolonged, and the economic and social benefit is good.
Formula of salt-frost-resistant crushed stone aggregate concrete curb and preparation method of curb
The invention discloses a formula of salt-frost-resistant crushed stone aggregate curb and a preparation method of curb. In 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 of the total amount of the cementing material, the 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 0.40; thee doping amount of a water reducing agent is 0.25 to 0.20 percent of the cementing material, and the consumption of an air entraining agent is 0.008 to 0.010 percent of the cementing material; the surface of the curb is coated with an organic film-forming coating. By adopting the crushed stone aggregate, optimizing the raw material proportion, doping appropriate amount of air entraining agent and taking surface anticorrosion treatment, the product has characteristics of good mixability of newly-mixed concrete, high forming quality, less consumption of cement, high strength, high frost resistance and the like. The 28-day pressure resisting strength is more than or equal to 40MPa, and the loss rate of the mass after the curb is circularly frozen by salt for 300 times is less than 2 percent. The frost risk of the concrete curb is greatly reduced, the service life of the concrete curb is greatly prolonged, and the economic and social benefit is good.
Formula of salt-frost-resistant crushed stone aggregate concrete curb and preparation method of curb
LI GUO (Autor:in) / DU JIANMIN (Autor:in) / WU XIAOSUO (Autor:in) / YANG BOYUAN (Autor:in)
23.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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