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This research investigated sulphate resistance of aerated concrete containing palm oil fuel ash as partial sand replacement. Plain aerated concrete with 100% river sand was used as control specimen. Aerated concrete containing palm oil fuel ash was prepared by integrating 30% of the ground palm oil fuel ash as partial sand replacement. For strength...
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... and 90 days. Specimens to be used for sulphate resistance test were prepared in form of mortar bars (25 x 25 x 250mm). After water cured for 28 days, the specimens were immersed in 10% Sodium Sulphate solution for duration of 9 weeks. The elongation of mortar bars were measured every week following the procedures outlined in ASTM C1012 - 13 [12]. Fig. 5 shows the strength of aerated concrete mix containing palm oil fuel ash as partial sand replacement is higher than control specimen throughout curing age. It is interesting to note, in this research aerated concrete containing palm oil fuel ash performs better than plain specimen even at early curing age. There is no reduction in the ...
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... One of the solutions to this problem is to find locally available waste material and integrate it as partial sand replacement in concrete production. This idea has motivated some researchers [2,3,4,5,6] to investigate the possibility of introducing waste material to function as partial sand substitute in concrete production. ...
The increasing demand for natural river sand supply for the use in construction industry along with the issue of environmental problem posed by the dumping of cockle shell, a by-product from cockle
business have initiated research towards producing a more environmental friendly concrete. This research explores the potential use of cockle shell as partial sand replacement in concrete production. Cockle shell used in this experimental work were crushed to smaller size almost similar to sand before mixed in concrete. A total of six concrete mixtures were prepared with varying the percentages of cockle shell viz. 0%, 5%, 10%, 15%, 20% and 25%. All the specimens were subjected to continuous water curing. The compressive strength test was conducted at 28 days in accordance to BS EN 12390. Finding shows that integration of suitable content of crushed cockle shell of 10% as partial sand replacement able to enhance the compressive strength of concrete. Adopting crushed cockle shell as partial sand replacement in concrete would reduce natural river sand consumption as well as reducing the amount of cockle shell disposed as waste.
