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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外加剂对沙漠砂混凝土3D打印性能的影响
Effect of Admixture on 3D Printing Performance of Desert Sand Concrete
2022年第9期
沙漠砂混凝土;3D打印;减水剂;纤维素醚;可再分散性乳胶粉;速凝剂;可打印性能
Desert sand concrete; 3D printing; Water reducing agent; Cellulose ether; Redispersible emulsion powder; Accelerator; Printing performance
2022年第9期
10.19761/j.1000-4637.2022.09.001.06
兵团科技攻关项目(2019DB004);兵团国际科技合作项目(2019BC005);新疆自治区研究生科研创新项目(XJ2021G071)。
张耀宇1,王文明1,2,蔡炎皓1,李 露3,孟 军1
1.新疆大学 建筑工程学院,新疆 乌鲁木齐 830046;2.湖南省建筑科学研究院有限责任公司, 湖南 长沙410011;3.河北工业大学 土木与交通学院,天津 300401

张耀宇1,王文明1,2,蔡炎皓1,李 露3,孟 军1

张耀宇,王文明,蔡炎皓,等.外加剂对沙漠砂混凝土3D打印性能的影响[J].混凝土与水泥制品,2022(9):1-6.

ZHANG Y Y,WANG W M,CAI Y H,et al.Effect of Admixture on 3D Printing Performance of Desert Sand Concrete[J].China Concrete and Cement Products,2022(9):1-6.

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英文名 : Effect of Admixture on 3D Printing Performance of Desert Sand Concrete
刊期 : 2022年第9期
关键词 : 沙漠砂混凝土;3D打印;减水剂;纤维素醚;可再分散性乳胶粉;速凝剂;可打印性能
Key words : Desert sand concrete; 3D printing; Water reducing agent; Cellulose ether; Redispersible emulsion powder; Accelerator; Printing performance
刊期 : 2022年第9期
DOI : 10.19761/j.1000-4637.2022.09.001.06
文章编号 :
基金项目 : 兵团科技攻关项目(2019DB004);兵团国际科技合作项目(2019BC005);新疆自治区研究生科研创新项目(XJ2021G071)。
作者 : 张耀宇1,王文明1,2,蔡炎皓1,李 露3,孟 军1
单位 : 1.新疆大学 建筑工程学院,新疆 乌鲁木齐 830046;2.湖南省建筑科学研究院有限责任公司, 湖南 长沙410011;3.河北工业大学 土木与交通学院,天津 300401

张耀宇1,王文明1,2,蔡炎皓1,李 露3,孟 军1

张耀宇,王文明,蔡炎皓,等.外加剂对沙漠砂混凝土3D打印性能的影响[J].混凝土与水泥制品,2022(9):1-6.

ZHANG Y Y,WANG W M,CAI Y H,et al.Effect of Admixture on 3D Printing Performance of Desert Sand Concrete[J].China Concrete and Cement Products,2022(9):1-6.

摘要
参数
结论
参考文献
引用本文

摘   要:为了解决沙漠砂在3D打印混凝土应用过程中存在黏聚性和保水性差、打印性能不良的问题,研究了4种不同掺量外加剂复掺对3D打印沙漠砂混凝土的流动性、凝结时间、建造性和可挤出性的影响。结果表明,沙漠砂作为骨料进行混凝土3D打印是可行的,通过掺入适量的减水剂(PCE)、纤维素醚(HPMC)、可再分散性乳胶粉(EVA)和速凝剂(CA)可有效改善混凝土的可打印性能。当沙漠砂混凝土的流动度在155~180 mm、贯入阻力在10~30 kPa范围内时,其性能满足3D打印混凝土的技术要求;当沙漠砂混凝土的流动度在160~165 mm、贯入阻力在17~23 kPa范围内时,其具有优异的可打印性能。

Abstract: In order to solve the problems of poor cohesion, water retention and printing performance of desert sand in the process of 3D printed concrete utilisation, the effects of four different admixtures with different dosage on the fluidity, setting time, construction performance and extrudability of 3D printed desert sand concrete were investigated. The results show that desert sand is feasible as aggregate for 3D concrete printing, and the printability of the printed slurry can be effectively improved by mixing appropriate amounts of water reducing agent(PCE), cellulose ether(HPMC), redispersible emulsion powder(EVA) and accelerator(CA). When the fluidity of desert sand concrete is 155~180 mm and the penetration resistance is 10~30 kPa, its performance can meet the technical requirements of 3D printed concrete. When the fluidity of desert sand concrete is 160~165 mm and the penetration resistance is 17~23 kPa, it has excellent printing performance.

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(1)当3D打印沙漠砂混凝土的流动度在155~ 180 mm时,浆体满足打印性能的要求,当流动度在160~165 mm时,打印性能良好。增加PCE掺量会增加浆体的初始流动度,HPMC、EVA、CA掺量增加则会使初始流动度稍有降低,但除CA外都可以减少浆体流动度的经时损失。4种外加剂对浆体流动度的影响排序为PCE>HPMC>CA>EVA。
(2)当3D打印沙漠砂混凝土的贯入阻力在10~30 kPa时,浆体可以顺利挤出,当浆体贯入阻力在17~23 kPa时,浆体的打印性能优异,挤出顺滑,且稳定性好。4种外加剂对浆体凝结时间的影响排序为CA>PCE>EVA>HPMC。
(3)3D打印沙漠砂混凝土的建造性与浆体的流动度大致呈相反趋势,与贯入阻力呈相同趋势,随着流动度的减小和贯入阻力的增加,浆体的建造性提高。4种外加剂对浆体建造性的影响排序为CA>PCE>HPMC>EVA。
(4)3D打印混凝土的可挤出性与浆体的流动度大致呈相同趋势,与贯入阻力呈相反趋势。在一定范围内,随着流动度的减小和贯入阻力的增加,浆体的可挤出性降低,但40 min内浆体流动度的减小和贯入阻力的增加有利于浆体的可挤出性。
(5)将沙漠砂用于3D打印混凝土是可行的,通过加入外加剂可显著改善3D打印混凝土的黏聚性和保水性,提高其建造性。

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张耀宇,王文明,蔡炎皓,.外加剂对沙漠砂混凝土3D打印性能的影响[J].混凝土与水泥制品,2022(9):1-6.

ZHANG Y Y,WANG W M,CAI Y H,et al.Effect of Admixture on 3D Printing Performance of Desert Sand Concrete[J].China Concrete and Cement Products,2022(9):1-6.

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