High dimensional variability is inherent in the manufacture of fibre-reinforced composite components. In the aerospace industry, this stems largely from the elevated temperatures needed to process the composite materials, which give rise to residual, or frozen-in, stresses; these are exacerbated by chemical shrinkage of the resin during cure. These stresses can subsequently cause distortion and...

The high strength and durability of high-performance concrete (HPC) may be significantly reduced by shrinkage cracking. use reactive magnesium oxide (MgO) can reduce cement-based materials due to its expansive properties. This study intends analyse the validity MgO as shrinkage-reducing agent in recycled aggregate HPC. To do so, ten HPC mixes with 0%, 25%, 100% both early-age (7-days air curing...

Industrial urea is an organic compound that widely used for various physiological processes and producing nitrogen fertilizers. This study hypothesized mixing with concrete would decrease the temperature expansion of cement microstructure abruptly due to reaction water a hydration product. tested hypothesis by experiments. The performance was evaluated after setting ratio industrial 0%, 5%, 10%...

Cracking is very common problem in cement mortar. Many past research has explored the prospect of using crumb rubber (CR) to overcome this issue. Different sizes CR have been tested measure its effect on pore structure and mechanical strengths Hence, study further modified mortar mix by adding silica fume synthetic fiber improve properties. The experimental results suggested that optimum replac...

Because of the significant difference between thermal expansion coefficients ceramic blank and glaze, glaze typically undergoes more pronounced shrinkage than during cooling, which results in high stress concentrations cracking. In this study, mechanical mechanism cracking is studied, based on statistical strength theory, damage mechanics, continuum mechanics. Furthermore, influence layer thick...

Concretes are designed to fulfill specific engineering requirements, commonly exemplified by slump, unit weight, and compressive strength. One source of untapped potential for varying engineering properties of hardened concrete is the variation of the cement particle size distribution. In this study, the performance of cements prepared by blending a coarse ASTM C150 Type I/II and a fine Type II...

Polyester-fiber-reinforced cement-stabilized concrete is widely adopted to prevent the shrinkage cracking in pavement engineering. However, effects of fiber length and content on dry temperature are not clear. The relationship between resistance strength also discussed scantily. Hence, five types polyester (1 cm, 3 5 7 9 cm) six (0.1‰, 0.3‰, 0.5‰, 0.7‰, 0.9‰, 1.1‰) were selected prepare fiber-r...

Although a lot of research has been performed with the use Superabsorbent polymers (SAPs) in cementitious materials, there is still lack studies describing SAPs large-scale concrete structures under realistic conditions. This paper presents results an in-field testing campaign where were used demonstrator. Commercial and in-house-developed (constituted alkali-stable alkali-unstable crosslinker,...