A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Cement-based dry hard concrete
The invention relates to cement-based dry hard concrete, which is prepared from the following components in parts by weight: 250 to 300 parts of cement, 1450 to 1610 parts of aggregate, 0.5 to 1.5 parts of water reducing agent, 0.3 to 0.5 part of adhesive and 180 to 220 parts of water; the aggregate comprises sand and waste mud, the weight of the waste mud is 5 to 25 percent of that of sand dust, and the waste mud is obtained by precipitating, airing, crushing and screening wastewater generated after flue gas desulfurization of magnesium hydroxide. The adhesive comprises polyvinyl alcohol and polyvinylidene fluoride, and the weight of the polyvinylidene fluoride is 25-50% of the weight of the polyvinyl alcohol. The waste mud can be used for replacing part of aggregate needed in cement-based hard concrete production, the 28-day breaking strength and the 28-day compressive strength of the waste mud are greatly improved. The treatment method can fill up the shortage of sand and stone and natural resources are protected; meanwhile, waste water generated after flue gas desulfurization of magnesium hydroxide can be well treated and reasonably recycled, and harm and burden brought to the environment are relieved.
本发明涉及一种水泥基干硬性混凝土，由重量份计，包括250～300份水泥、1450～1610份骨料、0.5～1.5份减水剂、0.3～0.5份粘合剂、180～220份水，所述骨料包括砂和废泥，其中废泥的重量为砂屑重量的5～25％，所述废泥为氢氧化镁进行烟气脱硫之后产生的废水经过沉淀、晾晒、破碎、筛分所得到，所述粘合剂包括聚乙烯醇和聚偏氟乙烯，其中聚偏氟乙烯的重量为聚乙烯醇重量的25～50％。本发明废泥可被用来替代水泥基干硬性混凝土生产中所需的部分骨料，其28天抗折强度和28天抗压强度均得到较大幅度提升，这种处置方法不仅能够填补砂、石的短缺，保护天然资源，同时也能够较好的处置氢氧化镁进行烟气脱硫之后产生的废水，使其被合理再利用，减轻给环境带来的危害和负担。
Cement-based dry hard concrete
The invention relates to cement-based dry hard concrete, which is prepared from the following components in parts by weight: 250 to 300 parts of cement, 1450 to 1610 parts of aggregate, 0.5 to 1.5 parts of water reducing agent, 0.3 to 0.5 part of adhesive and 180 to 220 parts of water; the aggregate comprises sand and waste mud, the weight of the waste mud is 5 to 25 percent of that of sand dust, and the waste mud is obtained by precipitating, airing, crushing and screening wastewater generated after flue gas desulfurization of magnesium hydroxide. The adhesive comprises polyvinyl alcohol and polyvinylidene fluoride, and the weight of the polyvinylidene fluoride is 25-50% of the weight of the polyvinyl alcohol. The waste mud can be used for replacing part of aggregate needed in cement-based hard concrete production, the 28-day breaking strength and the 28-day compressive strength of the waste mud are greatly improved. The treatment method can fill up the shortage of sand and stone and natural resources are protected; meanwhile, waste water generated after flue gas desulfurization of magnesium hydroxide can be well treated and reasonably recycled, and harm and burden brought to the environment are relieved.
本发明涉及一种水泥基干硬性混凝土，由重量份计，包括250～300份水泥、1450～1610份骨料、0.5～1.5份减水剂、0.3～0.5份粘合剂、180～220份水，所述骨料包括砂和废泥，其中废泥的重量为砂屑重量的5～25％，所述废泥为氢氧化镁进行烟气脱硫之后产生的废水经过沉淀、晾晒、破碎、筛分所得到，所述粘合剂包括聚乙烯醇和聚偏氟乙烯，其中聚偏氟乙烯的重量为聚乙烯醇重量的25～50％。本发明废泥可被用来替代水泥基干硬性混凝土生产中所需的部分骨料，其28天抗折强度和28天抗压强度均得到较大幅度提升，这种处置方法不仅能够填补砂、石的短缺，保护天然资源，同时也能够较好的处置氢氧化镁进行烟气脱硫之后产生的废水，使其被合理再利用，减轻给环境带来的危害和负担。
Cement-based dry hard concrete
一种水泥基干硬性混凝土
QU GUOLIANG (author) / GONG WEIZHONG (author) / WU ZHAN (author) / CHEN XIANDE (author) / WANG XIAOXIANG (author) / QU GUOLIAN (author) / SHI JIAN (author) / HUANG LINJUN (author)
2021-05-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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