Nguyen Khanh Hung, MSc

nguyenkhanhhung@lhu.edu.vn

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1. Enhancing compressive strength and durability of self-compacting concrete modified with controlled-burnt sugarcane bagasse ash-blended cements 

Duc-Hien Le, Yeong-Nain Sheen, Khanh-Hung Nguyen

Abstract: In sugar industries, the growing amount of sugarcane bagasse ash (SBA), a byproduct released after burning bagasse for producing electricity, is currently causing environmental pollution. The residual ash displays a pozzolanic potential; and hence, it has potential as a cement addictive. This study focuses on enhancing suitability of SBA through incorporating ground blast furnace slag (BFS) in manufacturing self-compacting concretes (SCCs). For this purpose, SBA was processed by burning at 700 °C for 1 h, before being ground to the cement fineness of 4010 cm2/g. SCC mixtures were prepared by changing the proportions of SBA and BFS (i.e., 10%, 20%, and 30%) in blended systems; and their performance was investigated. Test results showed that the presence of amorphous silica was detected for the processed SBA, revealing that the strength activity index was above 80%. The compressive strength of SCC …

2. An assessment of eco-friendly controlled low-strength material

Duc-Hien Le, Khanh-Hung Nguyen

Abstract: The present study aims to investigate the fresh and hardening properties of a soil-based controlled low-strength material (CLSM) containing stainless steel slag as a cementitious material. This type of CLSM primarily uses in construction as a trench-fill material. Four levels of the cement substitution (i.e. 0%, 10%, 20%, and 30%) and three amounts of binder content (80-, 100-, and 130 kg/m3) were generated for the experimental work. Fresh and hardening properties of the recommended CLSM were examined in the laboratory. The results show that the proposed CLSM could be employed for eco- friendly trench fills.