A kind of lightweight aggregate concrete and preparation method thereof
A lightweight aggregate concrete and lightweight aggregate technology, which is applied in the field of concrete, can solve the problems of poor homogeneity of lightweight aggregate concrete, achieve a good thickening effect, improve homogeneity, and reduce the effect of time loss
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preparation example 1
[0053] Step 1: Weigh 3kg of acrylate-methacrylate copolymer emulsion thickener and dissolve it in water, add 5kg of vacuum-dried mesoporous silica, and stir at 55°C for 2 hours to obtain a mixed suspension;
[0054] Step 2: heating the mixed suspension at 90°C until no steam escapes from the mixed suspension to obtain the primary dried crystal block;
[0055] Step 3: Vacuum-dry the initial dried crystal block for 5.5 hours at a drying temperature of 125°C to obtain the final dried crystal block;
[0056] Step 4: Grinding and sieving the final dried crystal blocks to obtain mesoporous silica-water-soluble thickener microbeads with a particle size of less than 0.5 mm.
preparation example 2
[0058] Step 1: Dissolve 3 kg of cellulose thickener in water, add 5 kg of vacuum-dried mesoporous silica, and stir at 55°C for 2 hours to obtain a mixed suspension;
[0059] Step 2: heating the mixed suspension at 90°C until no steam escapes from the mixed suspension to obtain the primary dried crystal block;
[0060] Step 3: Vacuum-dry the initial dried crystal block for 5.5 hours at a drying temperature of 125°C to obtain the final dried crystal block;
[0061] Step 4: Grinding and sieving the final dried crystal blocks to obtain mesoporous silica-water-soluble thickener microbeads with a particle size of less than 0.5 mm.
Embodiment 1
[0064] A kind of lightweight aggregate concrete, the components and weight of its raw materials are as shown in Table 2, and passed as figure 1 The method shown makes, specifically as follows:
[0065] S1: Lightweight aggregate pre-wet treatment: take 40% of the total water as soaking water, and the rest as mixing water, add the water reducing agent into the soaking water and stir evenly, immerse the weighed light aggregate in the water reducing agent soak in the water agent until the light aggregate is saturated with water, then take out the saturated light aggregate and drain to obtain the pre-wet light aggregate;
[0066] S2: Mix and pre-mix pre-wet lightweight aggregate with cement, fly ash, sand, aluminosilicate ore powder, and mesoporous silica-water-soluble thickener beads. The mixing time is 30 seconds to obtain the first mixture;
[0067] S3: Add mixing water and remaining soaking water to the first mixture, and stir for 150s to obtain lightweight aggregate concrete...
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