Concrete moisturizing curing and surface strengthening method
A technology for concrete surface and surface enhancement, which is applied in the processing of building materials, construction, building structure, etc., can solve the problems of unsatisfactory improvement of concrete erosion resistance, and achieve the reduction of chloride ion permeability coefficient and surface concrete porosity. , good dense filling effect, impermeability and durability improvement effect
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Embodiment 1
[0016] The C50 concrete specimens were prepared, and the mix proportions are shown in Table 1.
[0017] Table 1 Concrete mix ratio (unit g / m 3 )
[0018] cement fly ash mineral powder sand Stones (5~10mm) Stones (10~20mm) water Superplasticizer 363 48.5 72 704 422 633 155 2.5
[0019] Form three groups of 100mm×100mm×400mm concrete shrinkage specimens, 150mm×150mm×150mm compression specimens and 150mm cylindrical specimens according to the mix ratio in Table 1. After the final setting of the concrete specimens (10h), remove the formwork, Then apply a layer of DPS evenly with a soft brush immediately, and the coating amount is 0.2kg / m 2 , after the first layer is dry, apply the second layer of DPS, the coating amount is 0.2kg / m 2 , and then wrapped with a pre-saturated curing film for 28 days. The relative humidity of the concrete surface when the permeable crystalline material is coated is 70%, and the water storage capacity of the cur...
Embodiment 2
[0021] Form three groups of 100mm×100mm×400mm concrete shrinkage specimens, 150mm×150mm×150mm compression specimens and 150mm cylindrical specimens according to the mix ratio in Table 1. After the final setting of the concrete specimens (10h), remove the formwork, Then apply a layer of DPS evenly with a soft brush immediately, and the coating amount is 0.25kg / m 2 , after the first layer is dry, apply the second layer of DPS, the coating amount is 0.25kg / m 2 , and then wrapped with a pre-saturated curing film for 28 days. The relative humidity of the concrete surface when coating the permeable crystalline material is 80%, and the water storage capacity of the curing film is 1 kg / m 2 , and the water release rate is 0.03 kg / d.
Embodiment 3
[0023] Form three groups of 100mm×100mm×400mm concrete shrinkage specimens, 150mm×150mm×150mm compression specimens and 150mm cylindrical specimens according to the mix ratio in Table 1. After the final setting of the concrete specimens (10h), remove the formwork, Then apply a layer of DPS evenly with a soft brush immediately, and the coating amount is 0.05kg / m 2 , and then wrapped with a pre-saturated curing film for 28 days. The relative humidity of the concrete surface when the permeable crystalline material is coated is 70%, and the water storage capacity of the curing film is 1 kg / m 2 , and the water release rate is 0.03 kg / d.
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