用磷石膏制轻集料混凝土砌块

以贵州矿磷石膏、云南矿磷石膏和脱硫石膏为原料,通过水化造粒将磷石膏制成粗、细集料,并对粗集料进行必要的水泥包壳处理,再用普通混凝土工艺将其制成轻集料混凝土砌块。结果显示,制备的轻集料混凝土试块磷石膏占比高,具有轻质保温特性,不但抗压强度能达到墙体材料国家标准,还能承受严苛的冻融循环检验,完全符合墙体材料的要求,且能耗低、工艺简便易行,是极具市场潜力的磷石膏利用新技术。

Production of lightweight aggregate concrete blocks from phosphogypsum

After the dehydration of Guizhou ore phosphogypsum, Yunnan ore phosphogypsum and desulfurized gypsum, these hemihydrate phosphogypsum and desulfurized gypsum are hydrating granulated into porous aggregate, the coarse aggregate are cement-cladded. And then mixed them with cement and water to make concrete test blocks. The results show that: these lightweight aggregate concrete blocks are of higher phosphogypsum proportion, lightweight and thermal insulation. Their compressive strength and freeze-thaw cycle test can also come up to national standards of the wall material. This work opens a new approach with consume value and market potential for the use of phosphogypsum and desulfurized gypsum waste.