Influence of freeze-thaw cycles on fracture parameters values of lightweight concrete

被引：12

作者：

Kucharczykova, B. ^{[1
]}

Kersner, Z. ^{[2
]}

Pospichal, O. ^{[1
]}

Misak, P. ^{[1
]}

Vymazal, T. ^{[1
]}

机构：

[1] Brno Univ Technol, Inst Bldg Testing, Fac Civil Engn, Veveri 331-95, Brno 60200, Czech Republic

[2] Brno Univ Technol, Inst Struct Mech, Fac Civil Engn, Brno 60200, Czech Republic

来源：

FATIGUE 2010 | 2010年 / 2卷 / 01期

关键词：

Lightweight concrete; freeze-thaw test; fracture parameters; splitting tensile strength; durability;

D O I：

10.1016/j.proeng.2010.03.104

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Freezing and thawing resistance is very important characteristic also in the case of lightweight concrete. The paper deals with the influence of periodic freeze-thaw cycles on lightweight concrete fracture parameters values. Sets of lightweight concrete specimens (prismatic shape) are cyclically frozen in range from +20 degrees C to -20 degrees C. The main aim of the experimental part is to determine and compare the mechanical/fracture parameter values of a composite both frozen and non-frozen. The non-frozen specimens are air/water-cured. A three-point bending test of beams with a central edge notch is used in order to determine the fracture parameters values. It particularly covers effective fracture toughness and fracture energy. The notch is cut after 200 freezing cycles before fracture tests. The other parameters values - compressive and splitting tensile strength on the specimen fragments - are determined. (C) 2010 Published by Elsevier Ltd.

引用

页码：959 / 966

页数：8

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