Method for inhibiting alkali-silica reaction of concrete
An alkali silicic acid reaction and concrete technology, which is applied in the field of inhibiting concrete alkali silicic acid reaction, can solve the problems of admixture source and cost limitation, high cost, etc., and achieve the effects of saving procurement costs, controlling peripheral effects, and controlling costs
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Embodiment 1
[0021] The present invention comprises the following steps:
[0022] S1: Take the alkali-activated flint aggregate and grind it with a ball mill for 0.5h to form a specific surface area of 394.2m 2 / kg of powdered material to make it pozzolanic;
[0023] S2: mixing the powdery material, concrete raw material (including alkali-activated flint aggregate) and concrete gelling material, wherein the mixing amount of the powdery material is 50% of the total weight of the concrete gelling material.
[0024] The mixed concrete was tested by the mortar rod rapid method, and the expansion rates of 14 days and 56 days were 0.085% and 0.097% respectively; while the reduction rates of the expansion rates of 14 days and 56 days were 74.3% and 80.9%, respectively. The expansion rate is lower than 0.1%, which is the standard line for identifying alkali active materials, and can be used directly. Moreover, the expansion rate reduction rate is at an upper-middle level, which also guarantees...
Embodiment 2
[0026] The present invention comprises the following steps:
[0027] S1: Take the alkali-activated flint aggregate and grind it with a ball mill for 1.0h to form a specific surface area of 542.5m 2 / kg of powdered material to make it pozzolanic;
[0028] S2: mixing powdery material, concrete raw material (including alkali-activated flint aggregate) and concrete gelling material, wherein the mixing amount of powdery material is 40% of the total weight of concrete gelling material.
[0029] The mixed concrete was tested by the mortar rod rapid method, and the expansion rates were 0.057% and 0.070% in 14 days and 56 days, respectively; and the reduction rates of expansion rates in 14 days and 56 days were 82.8% and 86.2%, respectively.
Embodiment 3
[0031] The present invention comprises the following steps:
[0032] S1: Take the alkali-activated flint aggregate and grind it with a ball mill for 1.5 hours to form a specific surface area of 701.2m 2 / kg of powdered material to make it pozzolanic;
[0033] S2: mixing the powdery material, concrete raw material (including alkali-activated flint aggregate) and concrete gelling material, wherein the mixing amount of the powdery material is 30% of the total weight of the concrete gelling material.
[0034] The mixed concrete was tested by the mortar rod rapid method, and the expansion rates were 0.065% and 0.075% in 14 days and 56 days, respectively; and the reduction rates of expansion rates in 14 days and 56 days were 80.4% and 85.3%, respectively.
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