共查询到18条相似文献,搜索用时 140 毫秒
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高效减水剂对水泥熟料的助磨作用及与水泥熟料相容性问题的探讨 总被引:1,自引:0,他引:1
研究了不同类型的高效减水剂对水泥熟料的助磨作用,并进一步探讨了不同水泥熟料与高效减水剂之间的相容性问题,结果表明,高效减水剂对水泥熟料具有不同程度的助磨作用,作用的大小与减水剂掺量及熟料自身物料特性有关;高效减水剂与水泥熟料之间存在相容性问题,同一种水泥熟料与不同减水剂,同一种减水剂与不同水泥熟料之间的适应性不同。采用内掺高效减水剂的方法既改善了水泥熟料的易磨性,又增强了减水剂与水泥熟料的相容性,减水效果增加,流动度损失减小。 相似文献
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珠江水泥厂配料方案及其水泥特性的研究 总被引:1,自引:1,他引:0
分析了广东省内几家新型干法水泥厂的熟料成分及水泥性能,并着重研究了“粤秀”牌水泥配制混凝土时具有优良性能的原因。研究表明:即使同是新型干法窑生产的熟料,其矿物组成、物理性能及其与减水剂相容性仍存在着较大的差异;磨制成水泥后,由于受熟料矿物组成及水泥颗粒组成的影响,在配制混凝土时性能差异更大。故若要提高新型干法窑水泥在配制混凝土时的性能,应重视熟料的矿物组成,优化水泥的颗粒级配,改善水泥与减水剂的相容性,而不应单一重视熟料的物理性能。 相似文献
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水泥与减水剂相容性的研究 总被引:12,自引:1,他引:11
减水剂与水泥之间的相容性是现代混凝土生产与施工所必须考虑的问题,也是水泥生产企业应该关注的问题。本文研究了两种高效减水剂对不同企业生产的水泥的相容性,研究了掺不同混合材时水泥与减水剂的相容性。结果表明,同一种水泥与不同减水剂之间的相容性不一样;同一种减水剂与不同厂家的水泥之间的相容性也不一样;各种混合材对减水剂的适应性也有较大的差距。分析了影响水泥与高效减水剂相容性的因素。 相似文献
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水泥对高效减水剂适应性问题的分析及解决措施 总被引:7,自引:2,他引:5
分析探讨了影响我厂水泥与高效减水剂的适应性问题因素,其中以水泥熟料中C3A矿物含量偏高造成的影响最为显著。据此,提出了控制熟料中C3A矿物含量在8.0%以下,控制水泥粉磨温度和合理的颗粒级配,确定适宜的石膏掺量等措施,以提高水泥对减水剂的适应性。 相似文献
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使用日本的净浆流动度检验方法——T法流动度,对10种高效减水剂与5种水泥之间的相容性进行了交叉试验,旨在考察水泥与高效减水剂的相容性结果是否具有统计学的规律。结果显示,在本试验抽取样品范围内,无论是多个高效减水剂对水泥的相容性,还是多个水泥对高效减水剂的相容性,均具有很好的一致性,即相容性较差的高效减水剂对所有水泥的相容性均相对较差;相容性较差的水泥对所有高效减水剂的相容性均相对较差。 相似文献
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The phase constitution of alite in portland cement clinker highly depends not only in the chemical composition of a raw mix but also on the kinetics of crystallization from the interstitial melt. From the melt of high supersaturation alite can be crystallized so quickly as to take up foreign ions in quantities in favor of the occurrence of M3 at ambient temperature. The reverse is the case for the crystallization from the melt low in supersaturation, where M1 tends to be formed. The formation of zoned alite can be explained by the change in the degree of supersaturation during crystallization. The phase constitution of alite can be correlated with its crystal size in terms of the supersaturation of the melt. The SO3 in clinker considerably lowers the viscosity of the interstitial melt and thus encourages the formation of M1 along with the grain growth of alite. The relation between the phase constitution of alite and the quality of cements has been remarked in conjunction with the Ono's method. 相似文献
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提高白水泥熟料白度的工艺措施 总被引:1,自引:0,他引:1
简要分析了影响白水泥熟料白度的因素,综述了提高熟料白度的生产措施,认为选择优势原燃材料,合理配料,搞好均化,采用适量外加剂,加强操作,合理控制漂白水量和熟料储存期是提高白水泥熟料质量的有效途径。 相似文献
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《Cement and Concrete Research》1985,15(4):561-572
Influence of characteristics of alite and interstitial phase in five Japanese clinkers on early hydration of cement and rheological properties of fresh cement paste was investigated. The yield value of fresh cement paste increased rapidly at first due to the formation of ettringite, later due to the formation of C-S-H until it reached setting. The setting time was strongly influenced by alite intense hydration, which started when Ca(OH)2 saturation ratio in the liquid phase approached a maximum value. That position mainly was dependent upon the free CaO content in clinker and was partially dependent upon water soluble alkali content in clinker and hydraulic reactivity of alite itself. Changing the burning degree of clinker and the hydraulic modulus of raw mix, and intergrinding of clinker with quick lime are practical ways to reduce slump loss and to set an optimum setting time for concrete. All of these methods are related to free lime content for which optimum amounts are varied with burning degree of clinker and quick lime. 相似文献