A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Improvement of flexural strength of concrete pavements using natural rubber latex
Highlights Evaluation of compressive and flexural strengths for NRL-concrete. Evaluation of microstructure for NRL-concrete. Suggestion of cost-effective mix design of NRL-concrete pavement.
Abstract In this research study, natural rubber latex (NRL) was used as a “green” additive to improve the flexural strength properties of concrete pavements. The mechanical compressive and flexural strengths of NRL modified concrete were investigated, using various water-to-cement (w/c) and dry rubber content-to-cement (r/c) ratios and curing times. Scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) analyses techniques were used to examine the mechanical strength development of modified concrete. The results indicated that the compressive strength of NRL-concrete decreased with increasing the r/c ratio at all w/c ratios and curing times, whilst the highest flexural strengths were found at the optimal r/c = 0.58%, 1.16%, and 1.73% for w/c = 0.3, 0.4, and 0.5, respectively. The w/c ≤ 0.4 and r/c ≤ 2.31 as well as w/c = 0.5 and r/c = 0.58 to 1.73 were found to be applicable to NRL-concrete pavements, as the compressive and flexural strengths met the minimum requirements specified by the Department of Highways, Thailand. A mix design chart was proposed for NRL-concrete pavements, to facilitate the determination of effective mix ingredient based on operation and material cost to meet both economical and engineering criteria.
Improvement of flexural strength of concrete pavements using natural rubber latex
Highlights Evaluation of compressive and flexural strengths for NRL-concrete. Evaluation of microstructure for NRL-concrete. Suggestion of cost-effective mix design of NRL-concrete pavement.
Abstract In this research study, natural rubber latex (NRL) was used as a “green” additive to improve the flexural strength properties of concrete pavements. The mechanical compressive and flexural strengths of NRL modified concrete were investigated, using various water-to-cement (w/c) and dry rubber content-to-cement (r/c) ratios and curing times. Scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX) analyses techniques were used to examine the mechanical strength development of modified concrete. The results indicated that the compressive strength of NRL-concrete decreased with increasing the r/c ratio at all w/c ratios and curing times, whilst the highest flexural strengths were found at the optimal r/c = 0.58%, 1.16%, and 1.73% for w/c = 0.3, 0.4, and 0.5, respectively. The w/c ≤ 0.4 and r/c ≤ 2.31 as well as w/c = 0.5 and r/c = 0.58 to 1.73 were found to be applicable to NRL-concrete pavements, as the compressive and flexural strengths met the minimum requirements specified by the Department of Highways, Thailand. A mix design chart was proposed for NRL-concrete pavements, to facilitate the determination of effective mix ingredient based on operation and material cost to meet both economical and engineering criteria.
Improvement of flexural strength of concrete pavements using natural rubber latex
Yaowarat, Teerasak (author) / Suddeepong, Apichat (author) / Hoy, Menglim (author) / Horpibulsuk, Suksun (author) / Takaikaew, Thaworn (author) / Vichitcholchai, Nopparat (author) / Arulrajah, Arul (author) / Chinkulkijniwat, Avirut (author)
2021-02-11
Article (Journal)
Electronic Resource
English
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