Roads and Bridges - Drogi i Mosty
5, 3, 2006, 17-42

The counteracting of the concrete scaling problem by means of pre-wetted lightweight aggregate. Part II – Laboratory tests

Daria Jóźwiak-Niedźwiedzka Mail
Instytut Podstawowych Problemów Techniki PAN, Warszawa

Abstract


The first part of the paper was published in 2/2006 issue. The salt scaling tests were performed according to the Swedish Standard SS 13 72 44 (so-called Borås method). Freeze/thaw exposure was carried out on the upper horizontal surface of the specimens - cast surface, while the remaining surfaces were isolated against humidity and heat transfer. The scaled material was collected and weighed after a given number of freeze/thaw cycles, and the results expressed as mass per unit area were recorded. The internal frost resistance of the same concretes was tested according to ASTM C 666 A method and according to the Polish Standard PN-B/06250. Additionally, air-content A, specific surface , spacing factor L ̅ and the content of micropores below 0.3 mm A300 in the hardened concrete specimens were measured with the PN-EN 480-11 method on plane sections. It has been found out that the replacement of the fine fraction of the natural aggregate by the adequate fraction of the pre-wetted lightweight aggregate improved the scaling resistance and the internal frost resistance of concrete.

Full Text:

PDF

The counteracting of the concrete scaling problem by means of pre-wetted lightweight aggregate. Part II – Laboratory tests

  
Jóźwiak-Niedźwiedzka, Daria. The counteracting of the concrete scaling problem by means of pre-wetted lightweight aggregate. Part II – Laboratory tests. Roads and Bridges - Drogi i Mosty, [S.l.], v. 5, n. 3, p. 17-42, apr. 2006. ISSN 2449-769X. Available at: <>. Date accessed: 24 Apr. 2018.