【摘要】：磷β半水石膏中摻入不同質(zhì)量分?jǐn)?shù)的水泥和礦粉,組成磷石膏-水泥-礦粉復(fù)合材料,主要研究了其耐水性能和體積穩(wěn)定性,并且采用X射線衍射、掃描電子顯微鏡等技術(shù)分析硬化體的水化產(chǎn)物。結(jié)果表明:當(dāng)水泥和礦粉的摻量分別為5%和25%的時(shí)候,其28 d的軟化系數(shù)為0.85,同時(shí)體積穩(wěn)定性好。水泥和礦粉水化過程中,生成的主要產(chǎn)物水化硅酸鈣(C-S-H)和鈣礬石(AFt)會(huì)包裹磷石膏晶體,填充在硬化體的空隙之中,并且二水石膏晶體形貌由交錯(cuò)排列的短粗狀變?yōu)榘鍫睢?br/>[Abstract]:Phosphogypsum-cement-mineral powder composite was composed of cement and mineral powder mixed with different mass fraction of phosphogypsum. The water resistance and volume stability of phosphogypsum-cement-mineral powder composite were mainly studied, and X-ray diffraction was used to study the water resistance and volume stability of phosphogypsum. The hydration products of hardened body were analyzed by scanning electron microscope and other techniques. The results show that when the content of cement and mineral powder is 5% and 25% respectively, the softening coefficient for 28 days is 0.85 and the volume stability is good. During the hydration process of cement and mineral powder, calcium silicate hydrate (C-S-H) and ettringite (AFt) form the main products, which will enclose phosphogypsum crystal and fill in the void of hardened body. The crystal morphology of gypsum dihydrate changed from short coarse shape to plate shape.
【作者單位】： 湖北工業(yè)大學(xué)土木建筑與環(huán)境學(xué)院;
【基金】：國家自然科學(xué)基金(51372076) 湖北省科技支撐計(jì)劃項(xiàng)目(2014BCB027)
【分類號(hào)】：TB332

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