Preparation technology of fair-faced concrete and preparation method of special admixture
A technology of fair-faced concrete and preparation technology, applied in the field of concrete, can solve problems such as incomplete surface patterns, achieve strong adhesion, weak penetration, and reduce damage
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Embodiment 1
[0053] A clear-faced concrete preparation process mainly includes water, cement, fly ash, mineral powder, medium sand, gravel, dispersant, defoamer, air-entraining agent and water reducer.
[0054] This example includes 150 parts of water, 255 parts of cement, 115 parts of fly ash, 130 parts of mineral powder, 1000 parts of medium sand, 1000 parts of crushed stone, 0.1 part of dispersant, 0.0001 part of air-entraining agent, and 7.5 parts of water reducer .
[0055] The preparation method is as follows:
[0056] Step 1, wetting: Pour 5-10 parts of water into the blender to wet the blender;
[0057] Step 2: Pour the fly ash and mineral powder into the mixer and mix evenly;
[0058] Step 3: Pour in medium sand and gravel, and keep stirring;
[0059] Step 4: Add the remaining water and stir evenly;
[0060] Step 5: Pour in the cement and stir until uniform;
[0061] Step 6: Pour in the mixture of dispersant, defoamer, air-entraining agent and water reducer, and stir until un...
Embodiment 2
[0063] The preparation method of fair-faced concrete described in embodiment 2 and embodiment 5 is the same as the preparation method in embodiment 1, but each component content is different, record in table 1.
[0064] Table 1:
[0065]
[0066] The concrete prepared in Example 1-Example 5 was tested for structural strength, and the test results were recorded in Table 2.
[0067] Table 2:
[0068]
[0069] The comparative example is a concrete slab cast from ordinary Portland concrete.
[0070] Among them, the detection of alkali resistance is continuously sprayed with saturated calcium hydroxide solution, and the humidity resistance is continuously sprayed for 5 hours after atomization with warm water at 38°C.
[0071]Then inject the concrete prepared in Example 1-Example 5 into the steel mold, take out the steel mold after curing and molding, observe the flatness and graphic integrity of the molded concrete surface and record them in Table 2.
[0072]...
Embodiment 6
[0076] The preparation of a special additive includes water, organic solvent, dispersant, emulsifier, sodium stearate, silicate, perhydropolysilazane and siloxane.
[0077] Include 30 parts of water, 5 parts of organic solvents, 0.3 parts of dispersants, 0.01 parts of emulsifiers, 0.05 parts of sodium stearate, 0.01 parts of silicate, 0.8 parts of perhydropolysiloxane and 0.6 parts of silicone alkyl.
[0078] The preparation method is as follows:
[0079] S1: Mix perhydropolysilazane, siloxane, dispersant and organic solvent, and disperse evenly;
[0080] S2: Mix the mixed liquid in S1 with water and an emulsifier, and stir at high speed to form an emulsified suspension;
[0081] S3: Pour sodium stearate and silicate into it, and stir at high speed for 5-10 minutes.
[0082] The preparation method of Example 7-Example 9 is basically the same as the preparation method in Example 6, but the contents of each component are shown in the table below.
[0083] Table 4:
[0084] ...
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