苏州混凝土水泥制品研究院有限公司

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发布时间：2020-01-06 00:00:00
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超高强混凝土降黏型超支化聚羧酸减水剂的应用研究
Study on the Application of Viscosity Reducing Hyperbranched Polycarboxylate Superplasticizer for UHSC
2020年第10期
超高强混凝土；降黏；超支化结构；聚羧酸减水剂；流变特性
UHSC; Viscosity reduction; Hyperbranched; Polycarboxylate superplasticizer; Rheological behavior
2020年第10期
10.19761/j.1000-4637.2020.10.008.05
江苏省自然科学基金项目（BK20181127）。
王方刚1,2，陆加越1,2，杨 勇1,2，林 玮1,2，刘建忠1,2，龚志炜3
1.江苏苏博特新材料股份有限公司，江苏 南京 211103；2.高性能土木工程材料国家重点实验室，江苏 南京 210008；3.无锡交通建设工程集团有限公司，江苏 无锡 214026

王方刚1,2，陆加越1,2，杨 勇1,2，林 玮1,2，刘建忠1,2，龚志炜3

摘   要：通过净浆流动度、流变特性、吸附行为对自研发的减水剂进行了评价，优选出了降黏型超支化聚羧酸减水剂（PCE）。结果表明：同掺量时，超支化PCE-2、PCE-3的流动度大于梳状PCE-1；随着时间的延长，PCE-1流动度逐渐降低，而PCE-2和PCE-3的流动度在60 min内不损失，且略有提升；相同剪切速率下PCE-2和PCE-3的剪切应力和黏度均明显低于PCE-1，PCE-1存在剪切变稠现象，尤其是低水灰比（0.2）时剪切变稠现象更明显；PCE-2和PCE-3的吸附量远高于PCE-1，低水灰比（0.2）时PCE-1的吸附量与PCE-2和PCE-3的差距变小，但PCE-1在20 min后吸附量增长缓慢，明显低于PCE-2和PCE-3。降黏型超支化聚羧酸减水剂在实际工程应用中效果较好。

Abstract: The degree of paste fluidity, rheological behavior, and adsorption performance tests were used to evaluate the dispersion properties of PCE, and a viscosity reducing hyperbranched polycarboxylate superplasticizer was selected. The results show that the fluidity of hyperbranched PCE-2 and PCE-3 is greater than that of comb-like PCE-1 when the dosage is mixed, and the fluidity of PCE-1 decreases gradually with time, while the fluidity of PCE-2 and PCE-3 won′t lose within 60 min and increases slightly. At the same shear rate, the shear stress and viscosity of PCE-2 and PCE-3 are significantly lower than that of PCE-1, and PCE-1 has the phenomenon of shear thickening, especially at a low water-cement ratio(0.2). The adsorption capacity of PCE-2 and PCE-3 is much higher than that of PCE-1, and the difference between the adsorption capacity of PCE-1 and that of PCE-2 and PCE-3 is smaller at low water-cement ratio(0.2), and the adsorption capacity of PCE-1 increases very slowly after 20 min, which is significantly lower than that of PCE-2 and PCE-3. Viscosity reducing hyperbranched polycarboxylate superplasticizer has been successfully applied in actual engineering project.   

王方刚,陆加越,杨勇,等.超高强混凝土降黏型超支化聚羧酸减水剂的应用研究[J].混凝土与水泥制品,2020(10):8-11,16.

WANG F G,LU J Y,YANG Y,etal.Study on the Application of Viscosity Reducing Hyperbranched Polycarboxylate Superplasticizer for UHSC[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):8-11,16.

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摘   要：通过净浆流动度、流变特性、吸附行为对自研发的减水剂进行了评价，优选出了降黏型超支化聚羧酸减水剂（PCE）。结果表明：同掺量时，超支化PCE-2、PCE-3的流动度大于梳状PCE-1；随着时间的延长，PCE-1流动度逐渐降低，而PCE-2和PCE-3的流动度在60 min内不损失，且略有提升；相同剪切速率下PCE-2和PCE-3的剪切应力和黏度均明显低于PCE-1，PCE-1存在剪切变稠现象，尤其是低水灰比（0.2）时剪切变稠现象更明显；PCE-2和PCE-3的吸附量远高于PCE-1，低水灰比（0.2）时PCE-1的吸附量与PCE-2和PCE-3的差距变小，但PCE-1在20 min后吸附量增长缓慢，明显低于PCE-2和PCE-3。降黏型超支化聚羧酸减水剂在实际工程应用中效果较好。 Abstract: The degree of paste fluidity, rheological behavior, and adsorption performance tests were used to evaluate the dispersion properties of PCE, and a viscosity reducing hyperbranched polycarboxylate superplasticizer was selected. The results show that the fluidity of hyperbranched PCE-2 and PCE-3 is greater than that of comb-like PCE-1 when the dosage is mixed, and the fluidity of PCE-1 decreases gradually with time, while the fluidity of PCE-2 and PCE-3 won′t lose within 60 min and increases slightly. At the same shear rate, the shear stress and viscosity of PCE-2 and PCE-3 are significantly lower than that of PCE-1, and PCE-1 has the phenomenon of shear thickening, especially at a low water-cement ratio(0.2). The adsorption capacity of PCE-2 and PCE-3 is much higher than that of PCE-1, and the difference between the adsorption capacity of PCE-1 and that of PCE-2 and PCE-3 is smaller at low water-cement ratio(0.2), and the adsorption capacity of PCE-1 increases very slowly after 20 min, which is significantly lower than that of PCE-2 and PCE-3. Viscosity reducing hyperbranched polycarboxylate superplasticizer has been successfully applied in actual engineering project.
英文名 : Study on the Application of Viscosity Reducing Hyperbranched Polycarboxylate Superplasticizer for UHSC
刊期 : 2020年第10期
关键词 : 超高强混凝土；降黏；超支化结构；聚羧酸减水剂；流变特性
Key words : UHSC; Viscosity reduction; Hyperbranched; Polycarboxylate superplasticizer; Rheological behavior
刊期 : 2020年第10期
DOI : 10.19761/j.1000-4637.2020.10.008.05
文章编号 :
基金项目 : 江苏省自然科学基金项目（BK20181127）。
作者 : 王方刚1,2，陆加越1,2，杨 勇1,2，林 玮1,2，刘建忠1,2，龚志炜3
单位 : 1.江苏苏博特新材料股份有限公司，江苏 南京 211103；2.高性能土木工程材料国家重点实验室，江苏 南京 210008；3.无锡交通建设工程集团有限公司，江苏 无锡 214026

王方刚1,2，陆加越1,2，杨 勇1,2，林 玮1,2，刘建忠1,2，龚志炜3

摘   要：通过净浆流动度、流变特性、吸附行为对自研发的减水剂进行了评价，优选出了降黏型超支化聚羧酸减水剂（PCE）。结果表明：同掺量时，超支化PCE-2、PCE-3的流动度大于梳状PCE-1；随着时间的延长，PCE-1流动度逐渐降低，而PCE-2和PCE-3的流动度在60 min内不损失，且略有提升；相同剪切速率下PCE-2和PCE-3的剪切应力和黏度均明显低于PCE-1，PCE-1存在剪切变稠现象，尤其是低水灰比（0.2）时剪切变稠现象更明显；PCE-2和PCE-3的吸附量远高于PCE-1，低水灰比（0.2）时PCE-1的吸附量与PCE-2和PCE-3的差距变小，但PCE-1在20 min后吸附量增长缓慢，明显低于PCE-2和PCE-3。降黏型超支化聚羧酸减水剂在实际工程应用中效果较好。

Abstract: The degree of paste fluidity, rheological behavior, and adsorption performance tests were used to evaluate the dispersion properties of PCE, and a viscosity reducing hyperbranched polycarboxylate superplasticizer was selected. The results show that the fluidity of hyperbranched PCE-2 and PCE-3 is greater than that of comb-like PCE-1 when the dosage is mixed, and the fluidity of PCE-1 decreases gradually with time, while the fluidity of PCE-2 and PCE-3 won′t lose within 60 min and increases slightly. At the same shear rate, the shear stress and viscosity of PCE-2 and PCE-3 are significantly lower than that of PCE-1, and PCE-1 has the phenomenon of shear thickening, especially at a low water-cement ratio(0.2). The adsorption capacity of PCE-2 and PCE-3 is much higher than that of PCE-1, and the difference between the adsorption capacity of PCE-1 and that of PCE-2 and PCE-3 is smaller at low water-cement ratio(0.2), and the adsorption capacity of PCE-1 increases very slowly after 20 min, which is significantly lower than that of PCE-2 and PCE-3. Viscosity reducing hyperbranched polycarboxylate superplasticizer has been successfully applied in actual engineering project.   

王方刚,陆加越,杨勇,等.超高强混凝土降黏型超支化聚羧酸减水剂的应用研究[J].混凝土与水泥制品,2020(10):8-11,16.

WANG F G,LU J Y,YANG Y,etal.Study on the Application of Viscosity Reducing Hyperbranched Polycarboxylate Superplasticizer for UHSC[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):8-11,16.

摘要
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参考文献
引用本文

摘   要：通过净浆流动度、流变特性、吸附行为对自研发的减水剂进行了评价，优选出了降黏型超支化聚羧酸减水剂（PCE）。结果表明：同掺量时，超支化PCE-2、PCE-3的流动度大于梳状PCE-1；随着时间的延长，PCE-1流动度逐渐降低，而PCE-2和PCE-3的流动度在60 min内不损失，且略有提升；相同剪切速率下PCE-2和PCE-3的剪切应力和黏度均明显低于PCE-1，PCE-1存在剪切变稠现象，尤其是低水灰比（0.2）时剪切变稠现象更明显；PCE-2和PCE-3的吸附量远高于PCE-1，低水灰比（0.2）时PCE-1的吸附量与PCE-2和PCE-3的差距变小，但PCE-1在20 min后吸附量增长缓慢，明显低于PCE-2和PCE-3。降黏型超支化聚羧酸减水剂在实际工程应用中效果较好。

Abstract: The degree of paste fluidity, rheological behavior, and adsorption performance tests were used to evaluate the dispersion properties of PCE, and a viscosity reducing hyperbranched polycarboxylate superplasticizer was selected. The results show that the fluidity of hyperbranched PCE-2 and PCE-3 is greater than that of comb-like PCE-1 when the dosage is mixed, and the fluidity of PCE-1 decreases gradually with time, while the fluidity of PCE-2 and PCE-3 won′t lose within 60 min and increases slightly. At the same shear rate, the shear stress and viscosity of PCE-2 and PCE-3 are significantly lower than that of PCE-1, and PCE-1 has the phenomenon of shear thickening, especially at a low water-cement ratio(0.2). The adsorption capacity of PCE-2 and PCE-3 is much higher than that of PCE-1, and the difference between the adsorption capacity of PCE-1 and that of PCE-2 and PCE-3 is smaller at low water-cement ratio(0.2), and the adsorption capacity of PCE-1 increases very slowly after 20 min, which is significantly lower than that of PCE-2 and PCE-3. Viscosity reducing hyperbranched polycarboxylate superplasticizer has been successfully applied in actual engineering project.   

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（1）超支化型PCE的减水率和60 min经时流变性能优于梳状型PCE。
（2）在相同剪切速率下，超支化型PCE的剪切应力和黏度均低于梳状型PCE；在低水灰比时PCE-1剪切变稠现象较明显；PCE-1在剪切速率下30 min和60 min的黏度有明显区分，而PCE-3则逐渐趋于接近。
（3）超支化型PCE的吸附量远高于传统梳状型PCE；在极低水灰比时，超支化型PCE的吸附量与传统梳状型PCE的吸附量差距变小，但在20 min后，传统梳状型PCE吸附量的增长明显低于超支化型PCE。

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王方刚,陆加越,杨勇,等.超高强混凝土降黏型超支化聚羧酸减水剂的应用研究[J].混凝土与水泥制品,2020(10):8-11,16.

WANG F G,LU J Y,YANG Y,et al.Study on the Application of Viscosity Reducing Hyperbranched Polycarboxylate Superplasticizer for UHSC[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(10):8-11,16.

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