风积沙3D打印砂浆力学及收缩性能试验研究_《混凝土与水泥制品》杂志社

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发布时间：2020-01-06 00:00:00

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风积沙3D打印砂浆力学及收缩性能试验研究

Experimental study on the mechanical and shrinkage properties of 3D printed mortar with aeolian sand

2024年第6期

3D打印；风积沙；养护；力学性能；收缩性能

3D Printing; Aeolian sand; Curing; Mechanical property; Shrinkage performance

2024年第6期

10.19761/j.1000-4637.2024.06.012.06

周港明，杨富民，孙成晓，燕春福，王瑞

北京铁科首钢轨道技术股份有限公司，北京 102206

周港明，杨富民，孙成晓，燕春福，王瑞

周港明,杨富民,孙成晓,等.风积沙3D打印砂浆力学及收缩性能试验研究[J].混凝土与水泥制品,2024(6):12-17.

ZHOU G M,YANG F M,SUN C X,et al.Experimental study on the mechanical and shrinkage properties of 3D printed mortar with aeolian sand[J].China Concrete and Cement Products,2024(6):12-17.

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1000

摘要：研究了养护方式及不同风积沙掺量对3D打印砂浆力学性能及收缩性能的影响，并进行了现场打印试验。结果表明：现场养护（覆膜、洒水）有利于3D打印砂浆抗折强度的发展，而试验室养护（恒温水浴）有利于3D打印砂浆抗压强度的发展；随着风积沙取代率的增加，3D打印砂浆各龄期的抗压强度先增加后降低，当风积沙取代率为60%时，28 d抗压强度达到峰值；现场养护条件下，3D打印砂浆的体积变化表现为收缩；试验室养护条件下，3D打印砂浆表现为微膨胀；现场养护条件下，水泥水化生成较多AFt穿插在胶凝体系中，充当骨架作用，提高了3D打印砂浆的抗折强度；试验室养护条件下，水泥水化生成较多较致密的C-S-H、Al(OH)3等水化产物，提高了3D打印砂浆的抗压强度；现场打印试验也进一步证实了掺风积沙3D打印砂浆具有优异的性能。 Abstract: The effects of curing methods and different amounts of aeolian sand on the mechanical and shrinkage properties of 3D printed mortar were studied, and field printing experiments were conducted. The results show that the field curing method(film coating and watering) is beneficial to the development of flexural strength of 3D printed mortar, while the laboratory curing method(thermostatic water bath) shows a positive impact on the compressive strength of 3D printed mortar. With the increase of aeolian sand replacement rate, the compressive strength of 3D printed mortar at each age increases first and then decreases. When the replacement rate of aeolian sand is 60%, the compressive strength at 28 d reaches maximum values. Under the condition of field curing, the 3D printed mortar is shrinkage, and it shows micro-expansion under the condition of laboratory curing. For the field curing method, more hydration products of AFt generated by cement hydration are interspersed in the cementitious system, which acts as a skeleton and improves the flexural strength of 3D printed mortar. Under the condition of laboratory curing, there are more dense hydration products of C-S-H, Al(OH)3, etc. induced by the hydration of cement, thus improving the compressive strength of 3D printed mortar. The field printing tests also confirmes that the 3D printed mortar incorporates with aeolian sand exhibites better performance.

英文名 : Experimental study on the mechanical and shrinkage properties of 3D printed mortar with aeolian sand

刊期 : 2024年第6期

关键词 : 3D打印；风积沙；养护；力学性能；收缩性能

Key words : 3D Printing; Aeolian sand; Curing; Mechanical property; Shrinkage performance

刊期 : 2024年第6期

DOI : 10.19761/j.1000-4637.2024.06.012.06

文章编号 :

基金项目 :

作者 : 周港明，杨富民，孙成晓，燕春福，王瑞

单位 : 北京铁科首钢轨道技术股份有限公司，北京 102206

周港明，杨富民，孙成晓，燕春福，王瑞

周港明,杨富民,孙成晓,等.风积沙3D打印砂浆力学及收缩性能试验研究[J].混凝土与水泥制品,2024(6):12-17.

ZHOU G M,YANG F M,SUN C X,et al.Experimental study on the mechanical and shrinkage properties of 3D printed mortar with aeolian sand[J].China Concrete and Cement Products,2024(6):12-17.

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摘要

参数

结论

参考文献

引用本文

Abstract: The effects of curing methods and different amounts of aeolian sand on the mechanical and shrinkage properties of 3D printed mortar were studied, and field printing experiments were conducted. The results show that the field curing method(film coating and watering) is beneficial to the development of flexural strength of 3D printed mortar, while the laboratory curing method(thermostatic water bath) shows a positive impact on the compressive strength of 3D printed mortar. With the increase of aeolian sand replacement rate, the compressive strength of 3D printed mortar at each age increases first and then decreases. When the replacement rate of aeolian sand is 60%, the compressive strength at 28 d reaches maximum values. Under the condition of field curing, the 3D printed mortar is shrinkage, and it shows micro-expansion under the condition of laboratory curing. For the field curing method, more hydration products of AFt generated by cement hydration are interspersed in the cementitious system, which acts as a skeleton and improves the flexural strength of 3D printed mortar. Under the condition of laboratory curing, there are more dense hydration products of C-S-H, Al(OH)₃, etc. induced by the hydration of cement, thus improving the compressive strength of 3D printed mortar. The field printing tests also confirmes that the 3D printed mortar incorporates with aeolian sand exhibites better performance.

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