Concrete roughening method
A technology of concrete and concrete layers, which is applied to cohesive pavement paved on site, buildings, roads, etc., which can solve the problems of rough concrete surface, large fatigue deformation, and large equipment loss, and achieve good fluidity and high compressive strength , The effect of reducing the water-cement ratio
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Embodiment 1
[0055] A roughening method for ultra-high toughness concrete, comprising the following steps:
[0056] 1) Concrete is poured in the mould, and after leveling the surface, a concrete layer is obtained;
[0057] 2) Evenly spread the coarse quartz sand adhered to the high-strength sand slurry on the surface of the leveled concrete layer, and control the intensity of spreading the quartz sand so that the quartz sand is embedded below the surface of the concrete layer, and the embedding depth is 1-4mm;
[0058] 3) After 48 hours of final setting, use high-temperature steam curing at a curing temperature of 70-90°C for 48-72 hours to obtain concrete with a rough surface.
[0059] The coarse quartz sand adhered to the high-strength sand slurry is prepared by the following method: put the coarse quartz sand with a particle size of 8mm into the high-strength sand slurry, use the high-strength mortar material to wrap the coarse quartz sand, and wrap the excess high-strength mortar The ...
Embodiment 2
[0078] The characteristics of this embodiment are:
[0079] Described concrete is a kind of ultra-high toughness concrete, and its preparation method comprises the steps:
[0080] 1) Prepare raw materials according to the formula ratio: 1 part of cement, 0.2 part of silica fume, 0.02 part of slag, 0.05 part of fly ash, 0.35 part of quartz powder, 0.8 part of quartz sand, and the volume content accounts for 1.0% of the total volume of concrete The first steel fiber, the second steel fiber whose volumetric dosage accounts for 2.5% of the total volume of concrete, 0.03 part of nano-calcium carbonate, 0.20 part of water, and 0.014 part of water reducer;
[0081] 2) First add the cement, silica fume, fly ash, slag, quartz powder, quartz sand, nano-calcium carbonate, water reducing agent, first steel fiber, and second steel fiber into the stirring device for stirring. After uniformity, add the prescribed amount of water to stir and fluidize, control the stirring speed to 20-48r / min...
Embodiment 3
[0086] A roughening method for ordinary concrete, comprising the steps of:
[0087] 1) Pouring concrete in the mold or on the construction site, and leveling the surface to obtain the concrete layer;
[0088] 2) Evenly spread the coarse quartz sand adhered to the high-strength sand slurry on the surface of the leveled concrete layer;
[0089] 3) After 24 hours of final setting, use ordinary moisturizing curing, the curing temperature is natural temperature, and the curing time is 7-28 days to obtain concrete with a rough surface.
[0090] The coarse quartz sand adhered to the high-strength sand slurry is prepared by the following method: put the coarse quartz sand with a particle size of 8mm into the high-strength sand slurry, use the high-strength mortar material to wrap the coarse quartz sand, and wrap the excess high-strength mortar The material is screened out, and a layer of high-strength sand slurry with a thickness of less than 2mm is adhered to the surface of the coar...
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