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采用当地铸造型砂的废砂,通过试验室小试和生产线中试,替代天然细骨料,废型砂掺加量从10%~60%,证明废型砂完全可以用于生产混凝土路面砖。在路面砖的底层混凝土中掺加20%~30%废型砂,面层混凝土仍采用原配方,路面砖的性能基本没影响;萘系混凝土早强剂对改进掺废型砂的混凝土路面砖性能,有一定改善作用。
Using local foundry sand waste sand, through the pilot test and production line pilot, instead of natural fine aggregate, waste sand dosage from 10% to 60%, proved that the waste sand can be completely used in the production of concrete pavers. In the bottom of the pavement brick mixed with 20% to 30% of the waste sand, the surface of the concrete is still using the original formula, the performance of the pavement bricks basically no effect; naphthalene early hardening agent to improve the performance of concrete pavement mixed with sand, Have a certain improvement effect.