The lightweight concrete means that unit weight range is 1.7~2.0t/㎥, compressive strength range is 18~24MPa as class 1, and 1.4~1.7t/㎥, 15~18MPa as class 2 by the specification of korea. but the lightweight aggregate in this lightweight concrete is only mineral material like expanded clay, foamed sl...
The lightweight concrete means that unit weight range is 1.7~2.0t/㎥, compressive strength range is 18~24MPa as class 1, and 1.4~1.7t/㎥, 15~18MPa as class 2 by the specification of korea. but the lightweight aggregate in this lightweight concrete is only mineral material like expanded clay, foamed slag, used for structural application and lightweight aggregate mede by other material was not mentioned. the purpose of this study is to evaluate structural service application of the lightweight concrete contained expandable polystyrene beads and so that we investigate physical, mechanical and variational properties tested slump, air content, unit weight, compressive, tension and flexural strength, length change, freeze-thaw resistance. Mix rate of this study is 20, 30, 40% for EPSB substitution and 1:2(cement: sand)for W/C 40, 45%, and 1:0, 1:0.5, 1:1, 1:2 for W/C 50%. The result of study sa follows. The slump was over 15±2.5cm in the W/C 50% batches but added 0.2~0.9% of superplasticizer in the W/C 40, 45% batches. Air content was 2.2~10%, unit weight 1.13~1.75t/㎥, compressive stength 6.7~20.5MPa, tension strength 0.7~2.2MPa, flexural strength 1.43~4.77MPa. length change and freeze thaw resistance tested with W/C 40,45% batches, result was 6.12~8.54×10 -4 of dry shrinkage and good freeze thaw resistance except W/C 40%, EPSB substitution rate 20% batch. So Light weight concrete contained EPSB can use for structural service application and suitable mix rate is W/C 45%, EPSB substitution rate 20%, 1:2 as cement : sand volume rate of cement matrix.
The lightweight concrete means that unit weight range is 1.7~2.0t/㎥, compressive strength range is 18~24MPa as class 1, and 1.4~1.7t/㎥, 15~18MPa as class 2 by the specification of korea. but the lightweight aggregate in this lightweight concrete is only mineral material like expanded clay, foamed slag, used for structural application and lightweight aggregate mede by other material was not mentioned. the purpose of this study is to evaluate structural service application of the lightweight concrete contained expandable polystyrene beads and so that we investigate physical, mechanical and variational properties tested slump, air content, unit weight, compressive, tension and flexural strength, length change, freeze-thaw resistance. Mix rate of this study is 20, 30, 40% for EPSB substitution and 1:2(cement: sand)for W/C 40, 45%, and 1:0, 1:0.5, 1:1, 1:2 for W/C 50%. The result of study sa follows. The slump was over 15±2.5cm in the W/C 50% batches but added 0.2~0.9% of superplasticizer in the W/C 40, 45% batches. Air content was 2.2~10%, unit weight 1.13~1.75t/㎥, compressive stength 6.7~20.5MPa, tension strength 0.7~2.2MPa, flexural strength 1.43~4.77MPa. length change and freeze thaw resistance tested with W/C 40,45% batches, result was 6.12~8.54×10 -4 of dry shrinkage and good freeze thaw resistance except W/C 40%, EPSB substitution rate 20% batch. So Light weight concrete contained EPSB can use for structural service application and suitable mix rate is W/C 45%, EPSB substitution rate 20%, 1:2 as cement : sand volume rate of cement matrix.
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