Autoclaved sand-lime brick prepared from superfine copper tailings
A technology for autoclaved lime-sand bricks and copper tailings, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as affecting crop growth, destroying soil fertility, harming aquatic organisms, etc. The effect of disposal and utilization process, enhancing economic value, enhancing economic and environmental benefits
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Embodiment 1
[0029] The invention provides an autoclaved lime-sand brick prepared by using ultra-fine copper tailings, which includes cement, ultra-fine copper tailings, fly ash, common urban tap water, water reducing agent and river sand. Concrete parts by weight (kg) proportioning ratio as shown in Table 1,
[0030] Table 1
[0031] project cement Ultrafine Copper Tailings fly ash river sand water Superplasticizer Benchmark Group 1 28.9 0 17 83.8 17.2 0.09 Benchmark Group 2 28.9 8.5 8.5 83.8 17.2 0.09 Benchmark Group 3 28.9 10.2 6.8 83.8 17.2 0.09 Benchmark Group 4 28.9 11.9 5.1 83.8 17.2 0.09 Benchmark Group 5 28.9 13.6 3.4 83.8 17.2 0.09
[0032] Among them: fly ash is grade 2 or above, with a fineness of 200 mesh, accounting for more than 90%; river sand, with a fineness modulus of 2.7 and an apparent density of 2650kg / m 3 ; The ultra-fine copper tailings come from the Langyashan tailings pond in Chuzhou...
Embodiment 2
[0041] The invention provides an autoclaved lime-sand brick prepared by using ultra-fine copper tailings, which includes cement, ultra-fine copper tailings, slag, water reducing agent and ordinary urban tap water. Concrete parts by weight (kg) proportioning as shown in table 4,
[0042] Table 4
[0043] project cement Ultrafine Copper Tailings slag water Superplasticizer Benchmark group 6 330 0 1653 300 0.2 Benchmark Group 7 330 165.3 1487.7 300 0.16 Benchmark Group 8 330 495.9 1157.1 300 1.2 Benchmark Group 9 313.5 62.83 1653 285 0.3 Benchmark Group 10 297 125.66 1653 270 0.36 Benchmark Group 11 280.5 188.48 1653 255 0.48 Benchmark Group 12 264 251.31 1653 240 1.2
[0044] Among them: the slag is S105 grade high alumina slag, the apparent density is 2800kg / m 3 , BET specific surface area, 425m 2 / kg; the sand is ordinary river sand with a fineness modulus of 2.5; the ultra-fine cop...
Embodiment 3
[0051] The invention provides an autoclaved lime-sand brick prepared by using superfine copper tailings, which comprises cement, superfine copper tailings, metakaolin and common urban tap water. Concrete parts by weight (kg) proportioning ratio as shown in Table 6,
[0052] Table 6
[0053] project cement Ultrafine Copper Tailings Metakaolin river sand water Benchmark Group 13 144.50 42.00 85.00 402.25 86.00 Benchmark group 14 137.30 57.70 80.75 402.25 81.70 Benchmark Group 15 123.55 73.45 72.70 402.25 73.55 Benchmark Group 16 105.00 89.15 61.75 402.25 62.50
[0054] Wherein: metakaolin is commercially available calcined kaolin powder, preferably, the fineness is 400 meshes, accounting for more than 90%. The sand is ordinary river sand with a fineness modulus of 2.5; the ultra-fine copper tailings come from the Langyashan tailings pond in Chuzhou City, Anhui Province, and the particle size of the ultra-fine coppe...
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