Browsing by Author "Goel, P"

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item: Conference-Full-text
A comparative investigation on the effectiveness of awax and a resin based curing compound as an alternate of water curing for concrete pavement slab
(Springer, 2021) Goel, P; Kumar, R; Pasindu, HR; Bandara, S; Mampearachchi, WK; Fwa, TF
In this study, the effectiveness of two easily available concrete curing compounds in the Indian construction Industry namely; wax and synthetic resinbased, in comparison with water cured cubes and beams specimens of a paving concrete of 39 MPa compressive strength and 4.5 MPa flexural strength at 28-day has been reported. The concrete specimens were cast and kept for curing under different conditions such as in water, in the sunlight, and under the sunshade. Two coats of curing compounds as per the manufacturer’s instruction were applied on the surfaces of the concrete specimens and put in the sunlight and under the sunshade. The compressive and the flexural strength in comparison with water cured concrete specimens were evaluated. The study has shown 12% lower compressive strength and about 7% lower flexural strength for concrete samples cured with resin-based curing compound than the water cured samples. The study also indicates a reduction in compressive and flexural strengths of about 33% and 11%, respectively for waxbased curing compound. Finally, the study shows an upper hand for the resin-based curing compound, however, neither of them has shown potential as an alternate for the conventional water curing.
item: Conference-Full-text
Experimental study on moc cement based micro concrete for repairing of wide cracks in concrete pavement slabs
(Springer, 2021) Singh, A; Kumar, R; Goel, P; Pasindu, HR; Bandara, S; Mampearachchi, WK; Fwa, TF
Cracks of variable width and types can develop due to various factors like overloading, thermal expansion and contraction, moisture and temperature stresses, poor construction quality, loss of support underneath the slab, and other similar causes. Often a combination of these factors contributes to the propagation and widening of cracks over time resulting in surface roughness if not repaired properly. Wide crack even requires reconstruction or a full-depth repair. Cracks should be repaired with a durable material lasting for longer life. To repair these cracks, several materials and procedures have been developed. The efficiency of these materials and procedures depends on weather conditions and application efficiency. This study aims to develop a cost-effective magnesium oxychloride cement-based micro concrete for a faster repair of wide cracks; 25 mm or more. To simulate the conditions in the laboratory beam specimens cast and tested for flexure strength failure were used. Then broken beams were repaired by laboratory-developed MOC cement-based micro concrete and again tested for flexure strength. It was found that up to about 80% flexure strength can be restored in one day.