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研究了利用混凝土产品吸收二氧化碳的可行性。混凝土的3个基本组分:水泥、细沙和骨料,都可被用来作为二氧化碳吸附物以实现储留最大化,另外,可利用高钙钢渣等工业废料生产混凝土骨料。研究发现波特兰水泥2h碳化后吸收14%二氧化碳,碳化后的材料的强度与7d传统养护的强度相当。钢包钢渣细粉能吸收4%～12%二氧化碳,能用来替代河沙。吹氧高炉钢渣对二氧化碳吸收的能力超过12%。由此制成的粗骨料其强度可与石灰岩相比。如果混凝土砌块由这3组分组成,一块20cm×20cm×20cm的标准砌块能吸收1.39kg二氧化碳。二氧化碳在混凝土中的储留是一项经济可行、直接减排的有效技术。
The feasibility of using concrete products to absorb carbon dioxide was studied. The three basic components of concrete, cement, fine sand and aggregates, can all be used as carbon dioxide adsorbents to maximize storage. In addition, industrial aggregates such as high calcium slag can be used to produce concrete aggregates. The study found that after 2 hours of Portland cement carbonized 14% carbon dioxide absorption, the strength of the material after carbonization and 7d conventional conservation intensity quite. Ladle steel slag powder can absorb 4% to 12% of carbon dioxide, can be used to replace river sand. Oxygen blast furnace slag on carbon dioxide absorption capacity of more than 12%. The resulting coarse aggregate can be as strong as limestone. If the concrete block consists of these three components, a standard block of 20 cm by 20 cm by 20 cm absorbs 1.39 kg of carbon dioxide. Carbon dioxide in concrete storage is an economically viable, direct emission reduction effective technology.