DURABILITY OF POROUS LIMESTONE AGGREGATE CONCRETE UNDER HOT SUB-HUMID CLIMATE

Author(s): E. I. Moreno, R. G. Solís-Carcaño and J. Varela-Rivera
Paper category: Proceedings
Book title: Proceedings of CONSEC13 Seventh International Conference on Concrete under Severe Conditions - Environment and Loading Volume I
Editor(s): Z.J. Li, W. Sun, C.W. Miao, K.Sakai, O.E. Gjørv, N.Banthia
ISBN: 978-2-35158-124-7
e-ISBN: 978-2-35158-134-6
Publisher: RILEM Publications SARL
Publication year: 2013
Pages: 712-719
Total Pages: 961
Language : English

Abstract: The climate in the Yucatán peninsula may be classified as hot environment for concrete making. On one hand, the only source of aggregate for concrete is crushed limestone formed by marine calcareous sediments. This material is not very hard, thus limiting the strength resistance of concrete elements. On the other hand, traditional builders generally applied strength based design criteria and do not properly cure the concrete. Nevertheless, highly porous limestone aggregate has shown internal curing characteristics. Even concrete with one day curing is developing enough compressive strength compared with concrete with 28-day curing period. However, properties of the external concrete layer have suffered due to lack of curing, compromising the passivity provided to the reinforcing steel. Previous research in urban environments proved that the air permeability coefficient is 5 times higher, the abrasion resistance is 16% lower, and the carbonation coefficient is two times for 1-day curing concrete than for 28-day curing concrete, although compressive strength was about the same. The objective of this paper was to provide guidance for durable concrete structures made with this material under tropical environments. Results are confirming the sufficiency of internal curing properties of the material under the local climate conditions.

Online publication : 2013
Publication type : full_text
Public price (Euros) : 0.00