Machine-made sand light-expansion high early strength grouting material and preparation method thereof
A technology for machine-made sand and grouting material, applied in the field of machine-made sand grouting material, can solve the problems of difficult control of production cost, unfavorable natural environment protection, high sand price, and achieve good economic and social benefits, high early strength, no secondary Effects of Environmental Pollution
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Embodiment 1
[0024] Example one :A machine-made sand micro-expansion high-early-strength grouting material and its preparation method
[0025] (1) Raw material composition: It is composed of the following raw materials in weight percentage, 45% machine-made sand, 50% ordinary Portland cement, 2% expansion-reduction component, and 3% reinforcement component. The expansion-reduction component is compounded by high alumina cement and anhydrite at a weight ratio of 0.5:1, and the reinforcing component is compounded by polycarboxylate water-reducing agent dry powder and silica fume at a weight ratio of 0.05:1.
[0026] Raw material requirements:
[0027] Machine-made sand: MB value <1.4, stone powder content less than 5.0%, mud content less than 1.0%, moisture content less than 3%;
[0028] Ordinary Portland Cement: Strength grade is 42.5, Blaine's specific surface area is 350-400m 2 / Kg;
[0029] High alumina cement: strength grade is 42.5, alumina content is above 50%;
[0030] Anhydrite: CaSO 4 The c...
Embodiment 2
[0038] Example two : The same points as in the first embodiment will not be described, the difference is:
[0039] Raw material composition: machine-made sand 50%, ordinary Portland cement 45%, expansion-reduction component 3%, reinforcement component 2%. Among them, the weight ratio of high alumina cement and anhydrite in the expansion and shrinkage component is 1:1; the weight ratio of the dry polycarboxylate water-reducing agent powder and silica fume in the reinforcing component is 0.1:1.
[0040] Preparation method: first level dry mixing time 15min, second level dry mixing time 15min.
Embodiment 3
[0041] Example three : The same points as in the first embodiment will not be described, the difference is:
[0042] Raw material composition: machine-made sand 55%, ordinary Portland cement 40%, expansion-reduction component 2%, reinforcement component 3%. The weight ratio of the expansion and shrinkage component high alumina cement to anhydrite is 1.5:1; the weight ratio of the reinforcing component polycarboxylate water-reducing agent dry powder to silica fume is 0.15:1.
[0043] Preparation method: first level dry mixing time 10min, second level dry mixing time 20min.
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