Coal slag powder chlorine-oxygen-magnesium cement stable regenerated concrete aggregate and preparation method thereof
A technology of recycled concrete and magnesium oxychloride cement, which is applied in the field of building materials, can solve the problems of low utilization rate, and achieve the effects of convenient material collection, alleviating shortage, and saving cultivated land
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[0040] Example 1
[0041] First, the recycled concrete aggregate is produced according to the following process.
[0042] Specifically, the waste cement concrete road slabs, demolished building components, waste cement concrete test blocks, etc. are collected together; the recycled waste concrete is sequentially crushed, de-reinforced, secondly crushed, and obtained by screening. Recycled concrete aggregates in the particle size range are required; the mass percentage of the obtained recycled concrete aggregates through the following sieve holes is shown in Table 2.
[0043] Table 2 The content of recycled concrete aggregate passing through each sieve
[0044]
[0045] The crushed value of the obtained recycled concrete aggregate is 22.6% and the apparent density is 2.69g / cm 3 .
[0046] The sieving results in Table 2 above were mixed at a mass ratio of 13.4% rice sand, 39.2% melon seed flakes, 33.5% small crushed pieces, and 13.9% medium crushed pieces to obtain recycled concrete aggr...
Example Embodiment
[0053] Example 2
[0054] First, the recycled concrete aggregate is produced according to the following process.
[0055] Specifically, the waste cement concrete road slabs, demolished building components, waste cement concrete test blocks, etc. are collected together; the recycled waste concrete is sequentially crushed, de-reinforced, secondly crushed, and obtained by screening. Recycled concrete aggregates in the particle size range are required; the mass percentages of the obtained recycled concrete aggregates through the following sieve holes are shown in Table 4.
[0056] Table 4 The content of recycled concrete aggregate passing through each sieve
[0057]
[0058] The crushed value of the obtained recycled concrete aggregate is 24.6% and the apparent density is 2.72g / cm 3 .
[0059] The sieving results in Table 4 above were mixed at a mass ratio of 16.6% rice sand, 37.7% melon seed flakes, 25.6% small pieces, and 20.1% medium pieces to obtain recycled concrete aggregates.
[0060...
Example Embodiment
[0063] Example 3
[0064] In the description of Embodiment 3, the similarities with Embodiment 1 will not be repeated here, and only the differences from Embodiment 1 will be described. The difference between Example 3 and Example 1 is that a mixture of sodium phosphate, ferrous sulfate and alum with a mass ratio of 1:1:2 is used as an anti-water additive, and it is based on magnesium oxide, cinder powder, magnesium chloride, and water-resistant The mass ratio of the additives to the recycled concrete aggregate is 1.22:0.50:1.88:0.40:96. The mixed materials are mixed; the rest refer to the description in Example 1, to obtain the cinder powder magnesium oxychloride cement stabilized recycled concrete aggregate of this example.
[0065] Using the same measuring method as in Example 1, the service performance of the coal slag powdered magnesium oxychloride cement stabilized recycled concrete aggregate was measured. The maximum dry density and the optimal water content determined by t...
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