High-strength and high-performance concrete for deep frozen well wall and preparation method thereof
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A high-performance concrete, freezing well technology, applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc., to achieve the effect of good early strength, reduced heat of hydration, and easy transportation and watering
Inactive Publication Date: 2015-03-25
安徽恒源煤电股份有限公司
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Ordinary concrete structures cannot withstand strong external loads. Considering the special construction environment of frozen sh
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Embodiment 1
[0021] The concrete of this embodiment includes the following components: 380 parts of Portland cement, 390 parts of cementitious material, 726 parts of sand, 1184 parts of Xiejiaji limestone gravel, 148 parts of water, FS produced by Mengcheng County Waterproofing Material Factory -E special superplasticizer accounted for 3% of the total weight.
[0022] The fineness modulus of the sand is 2.6-3.2, and the specific surface area of the slag is 4300cm 2 / g of finely ground slag.
[0023] The preparation method of the present embodiment is as follows:
[0024] (1) Add cement, silica fume, slag, sand and gravel in proportion and stir evenly, then add water;
[0025] (2) Add water and stir evenly again, then add gelling material and water reducer and stir evenly.
Embodiment 2
[0027] The concrete of this embodiment includes the following components: 460 parts of Portland cement, 473 parts of cementitious material, 657 parts of sand, 1167 parts of Xiejiaji limestone gravel, 150 parts of water, FS produced by Mengcheng County Waterproofing Material Factory -E special superplasticizer accounted for 3% of the total weight.
[0028] Other implementations are the same as in Example 1.
Embodiment 3
[0030] The concrete of this embodiment includes the following components: 380 parts of Portland cement, 410 parts of cementitious material, 705 parts of sand, 1150 parts of Xiejiaji limestone gravel, 184 parts of water, FS produced by Mengcheng Waterproofing Agent Material Factory -A 4 The anti-crack waterproofing agent accounts for 8% of the total weight.
[0031] Other implementations are the same as in Example 1.
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Abstract
The invention discloses high-strength and high-performance concrete for a deep frozen well wall and a preparation method thereof. The concrete is prepared from the following components in parts by weight: 380-460 parts of cement, 0-43 parts of silicon powder, 0-110 parts of slag, 390-550 parts of a binding material, 650-726 parts of sands, 1108-1190 parts of stones, 146-184 parts of water and 2-8% a water reducer based on the total weight of the concrete. The preparation method comprises the following steps: after adding the cement, silicon powder, slag, sands and stones and uniformly mixing, adding water; and after adding water to further uniformly stir, adding the bonding material and the water reducer to uniformly stir. The concrete disclosed by the invention is good in early-high-strength, and the mould can be disassembled in about 8 hours; the concrete is simple in preparation process and good in workability, the collapsbillity is 120-180mm, and the concrete is convenient to convey and pour; the concrete is low in heat of hydration and high in durability; and the concrete is anti-crack and anti-penetration.
Description
technical field [0001] The invention relates to a concrete material, in particular to a deep-frozen well wall high-strength high-performance concrete and a preparation method thereof. Background technique [0002] The topsoil and weathered bedrock sections of the main shaft, auxiliary shaft and air shaft of the coal mine are constructed by freezing method. The thickness of the three shafts passing through the topsoil layer is at least 450m, and the designed net diameter of the shaft is at least 6m. [0003] Due to the deep topsoil layer that the three frozen shafts pass through, the large diameter of the shaft, and the complex stress on the shaft wall, it is necessary to adopt a high-strength shaft wall structure. Ordinary concrete structures cannot resist strong external loads. Considering the special construction environment of frozen shafts, whether it is low-strength concrete or high-strength concrete, higher requirements are placed on the performance of concrete. The s...
Claims
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