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A geopolymer and anti-carbonization technology, applied in the field of materials, can solve the problems of inability to guarantee strength, high energy consumption, complex manufacturing process, etc., and achieve the effects of less micro-cracks, reduced initial setting time, and fewer holes.
Inactive Publication Date: 2020-09-04
XIANGTAN UNIV
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This method uses molten steel slag and the material needs to be calcined by the slag method after mixing, which consumes a lot of energy and the manufacturing process
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preparation example Construction
[0025] A kind of preparation method of low-shrinkage, anti-carbonation steel slag geopolymer concrete concrete steps are as follows:
[0026] (1) Add fly ash, mineral powder and kaolin as required and dry mix for 5 minutes;
[0027] (2) Continue to stir for 15 minutes, and gradually add alkaline activator and free water;
[0028] (3) In order to prevent rapid coagulation, steel slag fine aggregate and steel slag coarse aggregate are finally added, stirred for 5 minutes until uniform and flowing well, and poured into the test piece after stirring to make geopolymer concrete;
[0029](4) Seal the geopolymer concrete specimen after pouring for 1 hour, and store it in an oven at 75°C for 18 hours. 50% of the curing in the control room.
Embodiment 1
[0031] Its mixing ratio of described concrete is that fly ash is 271.6kg / m 3 , ore powder is 38.8kg / m 3 , sodium hydroxide solution is 55.3kg / m 3 , sodium silicate solution is 138.7kg / m 3 , steel slag coarse aggregate is 1240kg / m 3 , steel slag fine aggregate is 619.5kg / m 3 , kaolin is 83.7kg / m 3 , free water 13.3kg / m 3 .
Embodiment 2
[0033] Its mixing ratio of described concrete is that fly ash is 271.6kg / m 3 , ore powder is 38.8kg / m 3 , sodium hydroxide solution is 55.3kg / m 3 , sodium silicate solution is 138.7kg / m 3 , steel slag coarse aggregate is 1590kg / m 3 , steel slag fine aggregate is 619.5kg / m 3 , kaolin is 83.7kg / m 3 , free water 13.3kg / m 3 .
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Abstract
The invention discloses low-shrinkage anti-carbonization steel slag geopolymer concrete. The steel slag geopolymer concrete comprises the following components: fly ash, mineral powder, kaolin, coarseand fine aggregates of steel slag, sodium hydroxide, sodium silicate and free water. The steel slag geopolymer concrete is characterized in that the mixing proportion of the fly ash is 271.6 kg/m<3>;the mixing proportion of the mineral powder is 38.8 kg/m<3>; the mixing proportion of a sodium hydroxide solution is 55.3 kg/m<3>; the mixing proportion of a sodium silicate solution is 138.7 kg/m<3>;the mixing proportion of the coarse aggregate of steel slag is 1200-1700 kg/m<3>; the mixing proportion of the fine aggregate of steel slag is 619.5 kg/m<3>; the mixing proportion of the kaolin is 83.7 kg/m<3>; and the mixing proportion of the free water is 13.3 kg/m<3>. Compared with the traditional slag aggregate concrete, the steel slag aggregate geopolymer concrete has higher compressive strength, can compensate shrinkage and reduce carbonization, and is enhanced in frost resistance. The mineral powder and the coal ash are mixed, so the expansibility influence of steel slag crystalline substances on the concrete is relieved and delayed. According to the invention, the used raw materials are simple, the early strength of a solidified body is improved by utilizing the waste steel slag and doping a small amount of kaolin, and the concrete has the advantages of low carbon, environmental protection performance, high strength, low shrinkage and good carbonization resistance.
Description
technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a low-shrinkage, carbonation-resistant steel slag geopolymer concrete and a preparation method. Background technique [0002] Geopolymer concrete is a new type of inorganic polymer with the most development prospects in contemporary times. This kind of concrete prepared with geopolymer as the cementitious material is not only easy to make, but also has higher strength and durability than ordinary concrete under the same conditions. Better performance and corrosion resistance. In the process of preparing geopolymer, the calcination and high temperature conditions of traditional cement are not required, and almost no harmful gas will be generated during the polymerization preparation at room temperature to 150 °C. The amount of carbon dioxide released by making 1 ton of geopolymer is only one-tenth of the amount of carbon dioxide released by making 1 ton of cement. ...
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