Green environment-friendly light-weight high-strength powder concrete
A powder concrete, green and environmentally friendly technology, applied in the field of concrete, to achieve the effects of low cost, reduced cohesion, and reduced bulk density
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Embodiment 1
[0050] Prepare concrete raw materials according to the following proportions:
[0051] 600 parts of Portland cement with an average particle size of 40 μm and above grade 42.5;
[0052] Average particle size 0.2μm, SiO 2 138 parts of silica fume with content ≥85%;
[0053] 103 parts of Class I fly ash with an average particle size of 30 μm;
[0054] 120 parts of mineral powder above grade S95 with an average particle size of 20 μm;
[0055] 725 parts of shale pottery sand with a continuously graded particle size of 0.16-4.75mm, a water absorption rate of less than 5%, and a cylinder compressive strength of not less than 6 MPa;
[0056] 23.5 parts of high-efficiency water reducing agent with water reducing rate greater than 30%;
[0057] 118 parts of water;
[0058] After the preparation of the above raw materials is completed, the stirring preparation is carried out according to the following steps:
[0059] (1) Soak the shale pottery sand in water for one hour, then dra...
Embodiment 2
[0073] Prepare raw materials according to the following proportions:
[0074] 550 parts of Portland cement above grade 42.5 with an average particle size of 30 μm;
[0075] Average particle size 0.1μm, SiO 2 125 parts of silica fume with content ≥85%;
[0076] 90 parts of Class I fly ash with an average particle size of 10 μm;
[0077] 110 parts of mineral powder above S95 grade with an average particle size of 10 μm;
[0078] 800 parts of shale pottery sand with a continuously graded particle size of 0.16-4.75mm, a water absorption rate of less than 5%, and a cylinder crushing compressive strength of not less than 6 MPa;
[0079] 21 parts of high-efficiency water reducing agent with water reducing rate greater than 30%;
[0080] 105 parts of water.
[0081] The preparation steps are the same as in Example 1.
[0082] The performance of the product prepared in this embodiment is as follows:
[0083] Compressive strength: 112MPa;
[0084] Flexural strength: 10.6MPa;
...
Embodiment 3
[0091] 650 parts of Portland cement above grade 42.5 with an average particle size of 60 μm;
[0092] Average particle size 0.8μm, SiO 2 150 parts of silica fume with content ≥85%;
[0093] 115 parts of Class I fly ash with an average particle size of 30 μm;
[0094] 130 parts of mineral powder above S95 grade with an average particle size of 50 μm;
[0095] 650 parts of shale pottery sand with a continuously graded particle size of 0.16-4.75mm, a water absorption rate of less than 5%, and a cylinder crushing compressive strength of not less than 6 MPa;
[0096] 26 parts of high-efficiency water reducing agent with water reducing rate greater than 30%;
[0097] 130 parts of water.
[0098] The preparation steps are the same as in Example 1.
[0099] The performance of the product prepared in this embodiment is as follows:
[0100] Compressive strength: 127MPa;
[0101] Flexural strength: 11.4MPa;
[0102] Elastic modulus: 40GPa;
[0103] Impermeability performance: ≥P...
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