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| | Based on experimental study,the paper points out that the developed high effi cient concrete plasticity-maintaining agent named BS1 is suitable to the premixed high strength flowing concrete which mus be transported for a long distance. | | 通过试验研究,指出研制的BS1型高效混凝土保塑剂很适宜于配制应用日益广泛的需远距离输送的预拌化、流态化、高强化的泵送混凝土。 | | 文摘来源 | | New type superplasicizer, compcsed of sulphonated naphthalene-formaldehyde condensates and some other chemicals, car resistant slump loss greatly and has a good compatbility with cements of different types. We usde it to the steel tube pumping concrete which has high strength and self-compacting successfully. | | 本文以萘系FDN减水剂为母体,复合多种有机物、无机物组分,制备了新型高效减水保塑剂。通过净浆、砂浆流动度实验及混凝土坍落度经时损失等实验,优选出最佳复合组分。工程应用情况表明,新型高效减水保塑剂可弥补原有萘系减水剂坍落度经时损失大、与膨胀剂相容性不好等缺点,适用于配制早强、高强、自密实、泵送钢管混凝土。 | | 文摘来源 | | The technological route of pumping concrete filled steel tube has been explained, a new_style pumping concrete filled steel tube is designed by adding superplasticize, fly ash, expansion agent, and its application yo the 3rd Jianghan Bridge, Wuhan and Longtan River Bridge, Zigui of Hubei Province has been introduced. The construction requirement is also stated. Worksite construction proved that the concrete had some good properties such as excellent pumping, low slump loss, very high strength at the later s... | | 介绍了新型泵送钢管混凝土的研究技术路线 ,利用高效减水保塑剂、粉煤灰、膨胀剂等原材料 ,设计了一种新型泵送钢管混凝土配合比 ,成功地应用于武汉市江汉三桥、湖北省姊归龙潭河等钢管混凝土大桥 ,并提出了具体的施工要求 .现场施工情况表明 ,该混凝土具有可泵性好、低坍落度损失、高强、早强、自密实及补偿收缩等性能 | | 文摘来源 | |   | | << 更多相关文摘 |
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