Machine-made sand concrete using synergist and preparation method of machine-made sand concrete
A machine-made sand and concrete technology, which is applied in the field of machine-made sand concrete, can solve the problems of slow increase in construction pumping strength, easy segregation and bleeding of the mixture, and difficult loss of slump, so as to improve resource utilization and conversion efficiency and improve water quality. Chemical process, solve the effect of water retention
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[0021] Example 1
[0022] (1) Weigh the raw materials of the artificial sand concrete synergist according to the mass percentage of each raw material, and put 0.3% nano-CaCO 3 Add to hexenyl bis-stearamide 16% and ultrasonically disperse to prepare nano-CaCO 3 Dispersions.
[0023] (2) Mix triethylenetetramine 19%, coconut oil fatty acid potassium glycinate 0.2%, alkyl alcohol amide 0.09%, 64.41% water, stir at 40°C for 1.5h, and then add the above nano-CaCO 3 The dispersion liquid was continuously stirred for 0.5h to obtain a synergist for machine-made sand concrete.
[0024] (3) Use the secondary feeding method to prepare concrete according to the ingredients in Table 2. Pour the weighed machine-made sand, crushed stone and 60% water into the mixer and stir for 60s, then add cement, fly ash, mineral powder and the remaining 40% The water, synergist, and water reducer are mixed for 1-2 minutes to obtain machine-made sand concrete, and the comparative example is the machine...
Example Embodiment
[0025] Example 2
[0026] (1) Weigh the raw materials of the artificial sand concrete synergist according to the mass percentage of each raw material, and weigh 0.4% nano-CaCO 3 Add to 18% monoglyceride stearate and ultrasonically disperse to prepare nano-CaCO 3 Dispersions;
[0027] (2) Mix 20% of triglycerol, 0.3% of coconut oil fatty acid sodium alanine, 0.1% of dodecyl dimethyl amine oxide and 61.2% of water, stir at 50°C for 2h, and then add the above nano-CaCO 3 Dispersion, continue to stir for 1h to obtain artificial sand concrete synergist;
[0028] (3) Use the secondary feeding method to prepare concrete according to the ingredients in Table 2. Pour the weighed machine-made sand, crushed stone and 60% water into the mixer and stir for 60s, then add cement, fly ash, mineral powder and the remaining 40% The water, synergist and water reducer are mixed for 1-2 minutes to obtain machine-made sand concrete.
Example Embodiment
[0029] Example 3
[0030] (1) Weigh the raw materials of the artificial sand concrete synergist according to the mass percentage of each raw material, and weigh 0.5% nano-CaCO 3 Add to 20% glycerol tristearate and ultrasonically disperse to prepare nano-CaCO 3 Dispersions;
[0031] (2) Mix triethylenetetramine 25%, coconut oil fatty acid sodium alanine 0.6%, dodecyl dimethyl amine oxide 0.3%, 53.65% water, stir at 60°C for 2.5h, and then add the above nanometer CaCO 3 Dispersion, continue to stir for 1.5h to obtain a synergist for machine-made sand concrete;
[0032] (3) Use the secondary feeding method to prepare concrete according to the ingredients in Table 2. Pour the weighed machine-made sand, crushed stone and 60% water into the mixer and stir for 60s, then add cement, fly ash, mineral powder and the remaining 40% The water, synergist and water reducer are mixed for 1-2 minutes to obtain machine-made sand concrete.
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