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Experimental study of lightweight aggregate concrete under multiaxial stresses

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Abstract

Lightweight aggregate concrete cube specimens (100 mm×100 mm×100 mm) and plate specimens (100 mm×100 mm×50 mm) were tested under biaxial compression-compression (CC) and compression-tension (CT) load combinations. For comparison, normal concrete plate specimens (100 mm×100 mm×50 mm) were tested under the same load combinations. Based on the test results, a two-level strength criterion of lightweight aggregate concrete in both octahedral stress coordinate and principal stress coordinate was suggested. The lightweight aggregate concrete cube specimens (100 mm×100 mm×100 mm) were then tested under triaxial compression-compression-compression (CCC) load combination with corresponding tests on normal concrete cube specimens (100 mm×100 mm×100 mm). The effect of intermediate principal stress on triaxial compressive strength is further examined. A “plastic flow plateau” area was apparent in principal compressive stress-strain relationships of lightweight aggregate concrete but not in normal concrete. A quadratic formula was suggested for the expression of strength criterion under triaxial compression.

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Authors and Affiliations

  1. Structural Engineering Institute, School of Civil Engineering, Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian, 116024, China

    Han-yong Liu & Yu-pu Song

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  1. Han-yong Liu
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  2. Yu-pu Song
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Correspondence to Han-yong Liu.

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Project (No. 50679007) supported by the National Natural Science Foundation of China

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Liu, Hy., Song, Yp. Experimental study of lightweight aggregate concrete under multiaxial stresses. J. Zhejiang Univ. Sci. A 11, 545–554 (2010). https://doi.org/10.1631/jzus.A0900619

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  • DOI: https://doi.org/10.1631/jzus.A0900619

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