《Materials in Civil Engineering》杂志刊登“纤维水泥板的耐久性能的评估”

作者：M. Jamshidi; H. R. Pakravan; and F. Pacheco-Torgal M. Jamshidi; H. R. Pakravan; and F. Pacheco-Torgal

刊物：《Materials in Civil Engineering》，25卷第9期，819-823页

关键词：纤维水泥板；耐久性；冻融循环；温水；干湿循环

摘要：根据规范规定，纤维水泥板的耐久性必须通过耐久试验（冻融循环，干湿循环，和温水）前后的断裂模量的比较进行评估。本文研究了两种不同的纤维水泥板试样耐久试验前后的断裂模量、延展性和韧性。结果表明，除了冻融试验以外的耐久试验试样的断裂模量与控制试样的断裂模量在试验前后基本相同，而在冻融试验中，经过100个循环之后，断裂模量减小了7-9%。根据规范要求，控制试样和用于进行耐久试验试样的断裂模量在试验前后的不同是可以忽略并接受的。在冻融循环（25和50个循环）和温水情况下，试样1的韧性和延展性分别减小了25%、35%和15%。然而，在冻融循环（50个循环）和温水情况下，试样2的韧性和延展性分别减小了40%和7%。研究的结果同时表明，在评估纤维水泥板的耐久性能时，也应该考虑韧性和延展性。

Assessment of the Durability Performance of Fiber-Cement Sheets

Authors: M. Jamshidi; H. R. Pakravan; and F. Pacheco-Torgal

Journal:《Materials in Civil Engineering》，Volume 25, Number 9,819–823

Key words：Fiber-cement sheets; Durability; Freeze-thaw; Warm water; Soak-dry

Abstract: According to standards, the durability performance of fiber-cement sheets must be evaluated by comparing the modulus of rupture (MOR) before and after durability tests (freeze-thaw, soak-dry, and warm water) are completed. This paper investigated the MOR of two different fiber-cement sheets samples before and after durability tests as well as its ductility and toughness. Results showed no significant difference between the MOR of control specimens and that of the specimens submitted to durability tests except in the case of the freezing and thawing test where after 100 cycles, a 7–9% decrease was observed. The differences between the MOR of the control specimens and that of the specimens submitted to durability tests were negligible and acceptable in accordance to the requirements of the standard. However, toughness and ductility decreased considerably in specimens of sample 1 by 25, 35, and 15%, respectively, when exposed to soak-dry (25 and 50 cycles) and warm water conditions. In turn, the reduction in toughness and ductility for specimens of sample 2 exposed to soak-dry (50 cycles) and warm water conditions were of 40 and 7%, respectively. The results of this investigation suggest that ductility and toughness should also be considered to assess the durability performance of fiber-cement sheets.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29MT.1943-5533.0000637