Admixture, concrete prepared therefrom and preparation methods for admixture and concrete prepared therefrom
A concrete and mixture technology, applied in the field of concrete and their preparation, can solve the problems of high cost and high energy consumption in production, and achieve the effect of increasing strength and low price
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Embodiment 1
[0023] The preparation process of the composite admixture: pass the raw sand through a 1mm sieve, a 0.5mm sieve, a 0.1mm sieve, and a 75μm sieve, and sieve to obtain limestone with a specific surface area of 300-400m2 / kg, and mix it with rice Shell ash is compounded at 6:4. Take 6kg of stone powder lime and 4kg of rice husk ash respectively, and stir them with a mixer for 30 minutes to obtain a composite admixture, which is denoted as S-F. The chemical compositions of steel slag and rice husk ash in the examples are shown in Table 1 to Table 2 respectively.
[0024]
[0025]
[0026] The above prepared S-F is used to prepare high-strength concrete, and the cement is replaced by S-F with a quality of 10% of the cementitious material quality; the cement is P O42.5R ordinary Portland cement produced by Guizhou Bijie Jiangtian Cement Factory; the fine aggregate is Guizhou The river sand produced by Bijie Panshi Building Materials Company has a fineness modulus Mx=2.84 and ...
Embodiment 2
[0032] The S-F prepared in Example 1 is replaced by S-F with a quality of 20% of the cementitious material quality; cement is P O42.5R ordinary Portland cement produced by Jiangtian Cement Factory in Bijie, Guizhou; fine aggregate is Panshi building materials in Bijie, Guizhou The river sand produced by the company has a fineness modulus of Mx=2.84 and a mud content of 0.9%; the coarse aggregate is a combination of two-stage coarse aggregates of 5-10mm melonite from the Zengcheng quarry and 5-20mm gravel from the Daya Bay quarry. 5~20mm continuous graded aggregate; water reducer is Kejie KJ-JS polycarboxylate high performance water reducer.
[0033] The mix ratio of this concrete is shown in Table 5, which is compared with pure cement concrete, single-mixed steel slag and rice husk ash concrete with the same amount. The working performance and compressive strength of the prepared concrete are shown in Table 6.
[0034]
[0035]
[0036] It can be seen from Table 6 of th...
Embodiment 3
[0038] The preparation process of the composite admixture: pass the raw sand through a 1mm sieve, a 0.5mm sieve, a 0.1mm sieve, and a 75μm sieve, and sieve to obtain limestone with a specific surface area of 300-400m2 / kg, and mix it with rice Hull ash is compounded at a ratio of 1:1. Take 5kg of limestone powder and 5kg of rice husk ash respectively, and stir them with a mixer for 30 minutes to obtain a composite admixture, which is denoted as S-F. The chemical compositions of steel slag and rice husk ash in the examples are respectively See Tables 1 to 2.
[0039] The above prepared S-F is used to prepare high-strength concrete, and the cement is replaced by S-F with a quality of 10% of the cementitious material quality; the cement is P O42.5R ordinary Portland cement produced by Guizhou Bijie Jiangtian Cement Factory; the fine aggregate is Guizhou The river sand produced by Bijie Panshi Building Materials Company has a fineness modulus Mx=2.84 and a mud content of 0.9%; th...
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