Mechanical properties of lightweight foamed concrete using polycarboxylate ether superplasticizer

14th International Conference on Concrete Engineering and Technology

Hui Ling, Philip Chie^1 ; Shim, Kan Chyau^1 ; Bennet, Lemba Anak^1 ; Tan, Cher Siang^2 ; Yong, Ee Ling^3

Faculty of Civil Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia^1

Forensic Engineering Centre, Institute for Smart Infrastructure and Innovative Construction, Universiti Teknologi Malaysia, Johor Bahru, Malaysia^2

Department of Water and Environmental Engineering, Universiti Teknologi Malaysia, Johor Bahru, Malaysia^3

关键词: Foamed concrete;    Optimum water content;    Polycarboxylate ethers;    Research focus;    Splitting tensile strength;    Structural concretes;    Structural works;    Superplasticizers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/431/6/062008/pdf
DOI  :  10.1088/1757-899X/431/6/062008

来源: IOP

【 摘 要 】

A study was conducted on the effect of polycarboxylate ether superplasticizer on the mechanical properties of lightweight foamed concrete. This research focuses on the compressive strength, splitting tensile strength and flexural strength of lightweight foamed concrete using 0.5% and 1.0% polycarboxylate ether superplasticizer with targeted density of 1500 kg/m3. Trial mix is carried out to determine the optimum water content for the 1:1 cement to sand ratio concrete mix. With optimum water content obtained, 7 days and 28 days samples are prepared and tested for both with and without polycarboxylate ether superplasticizer in compliance to ASTM standard. From the experiment, the optimum water content for 0.5% superplasticizer is 0.33 whereas the ratio for 1.0% superplasticizer is 0.30. The addition of superplasticizer yields best performance in all 28-days strength of lightweight foamed concrete. 1.0% addition of superplasticizer produces best result with 24.5MPa of compressive strength, 2.13MPa of splitting tensile strength and 9.49MPa of flexural strength. The addition of 1.0% superplasticizer makes the concrete mix fulfil the requirement of ACI 318 of structural concrete, which indicate the potential of mix in structural work.