磷渣对普通硅酸盐水泥缓凝特性影响的研究
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摘要
研究了磷渣在不同掺量下对普通硅酸盐水泥凝结时间及强度的影响,并分别向水泥中掺入易溶性和难溶性的磷酸盐和氟盐,测其凝结时间。研究结果表明:随着磷渣粉掺量的增加,磷渣水泥凝结时间逐渐增长,抗折强度和抗压强度逐渐降低,但后期强度发展迅速,基本能与空白组持平甚至超过空白组;无论是易溶性和难溶性的磷酸盐还是氟盐,在较低的掺量下均能对水泥产生缓凝作用,随着P_2O_5和F~-当量增加,易溶性的NaH_2PO_4和难溶性CaF_2、Ca(H_2PO_4)_2会显著延长水泥的凝结时间,而NaF则不会产生缓凝,甚至会出现速凝,说明磷渣造成缓凝的原因主要与磷渣里面磷和氟的形态及数量有关。
The effects of phosphorus slag (PS) content on setting time and strength of ordinary portland cement are studied,soluble and insoluble phosphate and fluoride were added to cement to research the effect on setting time of cement. The results show that with the increasing of PS content,the setting time of PS cement increases gradually,the flexural strength and compressive strength are decreasing gradually,but the later stage strength develops rapidly and can be match or even exceed the blank group; soluble and insoluble phosphate and fluoride all can delay the setting of cement with low content. With the increasing of the equivalent content of P_2O_5 and F~-,the setting time of cement is significantly prolonged by soluble NaH_2PO_4 and insoluble CaF_2,Ca(H_2PO_4)_2,while the setting time of soluble NaF is not retarded,even can rapid setting,so the main reason for the retarding of PS is related to the form and amount of phosphorus and fluorine in PS.
The effects of phosphorus slag (PS) content on setting time and strength of ordinary portland cement are studied,soluble and insoluble phosphate and fluoride were added to cement to research the effect on setting time of cement. The results show that with the increasing of PS content,the setting time of PS cement increases gradually,the flexural strength and compressive strength are decreasing gradually,but the later stage strength develops rapidly and can be match or even exceed the blank group; soluble and insoluble phosphate and fluoride all can delay the setting of cement with low content. With the increasing of the equivalent content of P_2O_5 and F~-,the setting time of cement is significantly prolonged by soluble NaH_2PO_4 and insoluble CaF_2,Ca(H_2PO_4)_2,while the setting time of soluble NaF is not retarded,even can rapid setting,so the main reason for the retarding of PS is related to the form and amount of phosphorus and fluorine in PS.
引文
[1]冷发光,包春霞.磷渣掺和料对水泥混凝土性能影响的试验研究[J].湖北水力发电,1998(3):43-47.
[2]孙成,郑峰伟,任园园,等.黄磷渣资源化利用研究[J].现代化工,2017,37(8):28-31.
[3]韩代水.利用黄磷渣生产磷渣超微粉用于水泥添加剂[J].磷肥与复肥,2012,27(4):72-73.
[4]王昕,颜碧兰,刘晨,等.不同细度粒化电炉磷渣粉对水泥性能影响与改良[J].水泥,2017(2):1-7.
[5]王绍东,赵镇浩.新型磷渣硅酸盐水泥的水化特性[J].硅酸盐学报,1990(4):379-384.
[6]冷发光,包春霞.磷渣掺合料对水泥混凝土需水性和凝结时间影响的试验研究[J].混凝土与水泥制品,1998(2):18-21.
[7]程麟,盛广宏,皮艳灵,等.磷渣对硅酸盐水泥的缓凝机理[J].硅酸盐通报,2005,24(4):40-44.
[8]盛广宏.磷渣活性的激发及对硅酸盐水泥的缓凝机理[D].南京:南京工业大学,2004.
[9]刘秋美.磷渣粉在混凝土中的应用研究[D].贵阳:贵州大学,2007.
[10]栗静静,叶建雄,石拥军.磷渣掺合料对混凝土性能影响的试验研究[J].粉煤灰综合利用,2007(6):18-21.
[11]陈霞,杨华全,张建峰.磷酸盐和氟盐对水泥凝结特性的影响及作用机理[J].长江科学院院报,2015,32(12):109-113.
[2]孙成,郑峰伟,任园园,等.黄磷渣资源化利用研究[J].现代化工,2017,37(8):28-31.
[3]韩代水.利用黄磷渣生产磷渣超微粉用于水泥添加剂[J].磷肥与复肥,2012,27(4):72-73.
[4]王昕,颜碧兰,刘晨,等.不同细度粒化电炉磷渣粉对水泥性能影响与改良[J].水泥,2017(2):1-7.
[5]王绍东,赵镇浩.新型磷渣硅酸盐水泥的水化特性[J].硅酸盐学报,1990(4):379-384.
[6]冷发光,包春霞.磷渣掺合料对水泥混凝土需水性和凝结时间影响的试验研究[J].混凝土与水泥制品,1998(2):18-21.
[7]程麟,盛广宏,皮艳灵,等.磷渣对硅酸盐水泥的缓凝机理[J].硅酸盐通报,2005,24(4):40-44.
[8]盛广宏.磷渣活性的激发及对硅酸盐水泥的缓凝机理[D].南京:南京工业大学,2004.
[9]刘秋美.磷渣粉在混凝土中的应用研究[D].贵阳:贵州大学,2007.
[10]栗静静,叶建雄,石拥军.磷渣掺合料对混凝土性能影响的试验研究[J].粉煤灰综合利用,2007(6):18-21.
[11]陈霞,杨华全,张建峰.磷酸盐和氟盐对水泥凝结特性的影响及作用机理[J].长江科学院院报,2015,32(12):109-113.