Concrete compressive strength of mix proportioning cockle shell, glass powder and epoxy resin under hot water curing condition through response surface methodology

Abstract

Nowadays, the significant demand for concrete has become a problem in concrete using aggregate from waste. Using standard concrete is recommended to reduce the breakdown of buildings. Unfortunately, standard materials used to produce previous concrete are not entirely environmentally friendly. As a result, many researchers have committed their awareness to identifying eco-friendlier substitutions in manufacturing concrete substitution aggregate from waste. In this respect, this paper discussed the proposed efficient procedure to indicate the compressive strength from mixed proportioning cockle shell, glass powder, and epoxy resin as concrete under hot water curing conditions (60°C, 4 hr) using response surface methodology. The experimental design used in this research uses a response surface methodology. There are three aggregates to be investigated, namely cockle shell powder, glass powder and epoxy resin under hot water curing condition (60°C, 4 hr). Under hot water curing conditions, this research discovered that adding 4.0% cockle shell powder and 10.0 % glass powder increased the compressive strength to 104.68 MPa. On the other hand, 4.0% cockle shell powder, 10.0% glass powder and 2% epoxy resin under hot water curing conditions improved the compressive strength to 115.70 MPa. It was therefore inferred that the use of both cockle shell powder and glass powder to produce cleaner and compressive strength concrete is applicable, both mechanically and environmentally.

Using beam and ENDB specimens to evaluate fracture characteristics of wavy steel fiber‐reinforced self‐compacting concrete containing different coarse aggregate volumes

“…To increase the flowability of the concrete mix and achieve properties of the WSFRSCC, use has been made, in this study, of a strong water reducer called also superplasticizer (SP) that is yellow in color and is based on polycarboxylate. The plastic viscosity of the WSFRSCC was provided by an ultrafine limestone powder with a specific weight equal to 2.63 g/cm 3 . The water used in this study to produce and process the specimens is a drinking type with a temperature of 22 ± 2 C and has properties in accordance with the requirements of ASTM C94.…”

“…The water used in this study to produce and process the specimens is a drinking type with a temperature of 22 ± 2 C and has properties in accordance with the requirements of ASTM C94. 75 The SCC was reinforced with WSFs (Figure 2) with the following specifications: diameter = 0.6 mm, length = 30 mm, density = 7.85 g/cm 3 , and tensile strength = 12,000 kg/cm 2 .…”

“…As a very widely used material in the construction industry, concrete consists mainly of cement, water, and aggregates; the latter makes up about 55%–80% of the concrete volume 1 . As researchers have always tried to enhance the concrete quality and enable its properties to comply with code regulations and principles, 2,3 the self‐compacting concrete (SCC) was invented in mid‐1980s to improve the vibration conditions, reduce the labor force, increase the quality, and optimize the flowability 4,5 . It has more powder material and less coarse aggregate (CA) volume than normal vibrated concrete (NVC) to ensure fallibility, passability, and inseparability 6 .…”