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Strength and Durability of Lightweight and Normal Weight Concrete

1999; American Society of Civil Engineers; Volume: 11; Issue: 3 Linguagem: Inglês

10.1061/(asce)0899-1561(1999)11

1943-5533

Husain Al‐Khaiat, Naseer Haque,

Concrete Properties and Behavior

A research project has been undertaken in Kuwait University to investigate the long-term strength development and durability of lightweight aggregate concretes (LWAC's) and a normal weight concrete (NWC) under hot dry and hot humid coastal exposure conditions. This paper reports the strength development and durability characteristics of 35- and 50-MPa NWC specimens exposed to the seaside up to an age of 9 months. The water penetrability of LWACs seems to be more sensitive to the extent of initial curing than it is for NWC. The water penetrability of LWC50 after 7 days of initial curing and subsequent exposure to the seaside was about 1/3 more than that of the NWC50 in the same exposure condition. The depth of carbonation, sulfate, and chloride penetration, and concentration in LWC50 were somewhat higher than that in NWC50 under similar exposure regimes.