Title:
Development of Strength and Fracture Properties of Styrene-Butadiene Copolymer Latex-Modified Concrete
Author(s):
Suvimol Sujjavanich and James R. Lundy
Publication:
Materials Journal
Volume:
95
Issue:
2
Appears on pages(s):
131-143
Keywords:
characteristic length; crack mouth opening displacement;
deformability; early age performance; fracture energy; latex-modified concrete;
microcracks; prepeak; postpeak; strain softening; strength development;
styrene butadiene;
DOI:
10.14359/358
Date:
3/1/1998
Abstract:
This paper reports latex-modified concrete (LMC) strength and fracture properties at ages ranging from 5 hours and 28 days. The development of strength, deformability, and fracture properties was slightly different from conventional concrete. Test results indicate a significant improvement in reducing and bridging microcracks, especially in the prepeak load region. The load deflection relationship was observed to be highly linear up to 0.93 of peak load. Fracture toughness and deformability increased significantly. Fracture energy varies from 2.3 to 133.1 N/m, depending on age, and to some degree, on notch depth ratio. However, the postpeak behavior was quite similar to conventional concrete. In the range studied, notch depth appears to have less effect, compared to normal concrete. The crack mouth opening displacement control method provided consistent values which may benefit other researchers.