A kind of flexible anti-cracking covering anti-seepage material with steel slag as main material and construction technology
A technology of anti-seepage material and construction technology, which is applied in the field of flexible anti-cracking covering anti-seepage material and construction technology with steel slag as the main material, which can solve the problems of deterioration of anti-seepage performance and easy cracking of the anti-seepage material of the covering layer, and achieve improvement Effects of compactness, drastic decrease in solution performance, and reduction in concentration of metal cations
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Embodiment 1
[0045] The preparation and construction process using the above-mentioned anti-seepage and anti-cracking material includes the following steps:
[0046] (1) The natural steel slag is washed with water and then air-dried, and then sieved according to the four particle size ranges of 0.5-1mm, 0.25-0.5mm, 0.1-0.25mm and 0.075-0.1mm, and the steel slag 1 is configured with reference to the preferred gradation: The mass between 0.5-1mm accounts for 40%, the mass between 0.25-0.5mm accounts for 30%, the particle size between 0.1-0.25mm accounts for 20%, and the particle size between 0.075-0.1mm 10%), and stir well. Then according to the demand, calculate and weigh the required total amount of steel slag (accounting for 94.7% of the total mass) according to the compaction degree of 85%.
[0047] (2) Calculate and weigh the required dry sodium calcium bentonite 2 total amount (accounting for 5% of the total mass) according to the degree of compaction of 85%, evenly add it to the stee...
Embodiment 2
[0055] The anti-seepage material of Example 2 is slightly different from Example 1, the difference is that according to the mass ratio of steel slag, sodium calcium bentonite and fiber, specifically steel slag 92.1%, sodium calcium bentonite 7.5%, polypropylene Fiber 0.4%. In order to verify its anti-seepage performance and anti-cracking performance, the flexible wall penetration test and three dry-wet cycle tests were carried out respectively. The penetration test results are shown in Example No. 2 in Table 1, which satisfies the "Technical Specification for Domestic Waste Landfill Treatment". (GB 50869-2013) requirements for the permeability coefficient of anti-seepage materials, and there are no obvious cracks after three dry-wetting cycles.
example 3
[0057] Example 3 The anti-seepage material is slightly different from Example 1, the difference is that according to the mass ratio of steel slag, sodium calcium bentonite and fiber, specifically steel slag 89.5%, sodium calcium bentonite 10%, polypropylene fiber 0.5%. In order to verify its anti-seepage performance and anti-cracking performance, the flexible wall penetration test and 5 dry-wet cycle tests were carried out respectively. The penetration test results are shown in Example No. 3 in Table 1, and the permeability coefficient of the anti-seepage material is not greater than 10. -7 cm / s requirements, and no obvious cracks after drying and wetting cycles.
[0058] Table 1 Examples of anti-seepage and anti-cracking effects
[0059]
[0060]It can be seen from the above table that the permeability coefficients of the flexible anti-cracking and covering anti-seepage materials with steel slag as the main material obtained in Examples 1-3 all meet the requirements of th...
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