返回Google圖書搜尋

Evaluation of ASTM E 514-90 Water Penetration and Leakage Test to Assess Performance of Integral Water Repellent Admixtures

出版	ASTM International, 1993
URL	http://books.google.com.hk/books?id=dsB9zgEACAAJ&hl=&source=gbs_api

註釋Integral water repellent admixtures have played an important role in improving performance of architectural concrete block by minimizing penetration of water into the concrete block wall. The ASTM E 514-90 Test Method for Water Penetration and Leakage through Masonry is commonly used to measure the performance of unit masonry subjected to a 4 hour simulated wind-driven rain. A laboratory test program was conducted to evaluate the effectiveness of the ASTM E 514-90 test method in determining performance of walls constructed with materials which contain integral water repellent admixtures, to determine the effect of extending the test period from 4 hours up to 72 hours and to compare the performance of four different integral water repellent admixtures.