Abstract
Grout is a cement-based material with high strength and workability that allowing it to be injected into small cracks or leaky areas. It is usually used to patch concrete cracks or holes, but it may also be used to fill voids under metal bases or digging anchors. Furthermore, grout is used efficiently in the production process of semi-flexible pavement mixtures. The purpose of this study is to characterize the effect of grout ingredients on their mechanical properties. The grout ingredients were Ordinary Portland Cement (OPC), silica fume (SF), emulsion (Em), super-plasticizer (SP), and water. Different proportions of mentioned materials were used to characterizing the developed grout through flowability, compressive strength, and flexural strength tests. Results showed that the flow time decrease with an increase in the W/B. Also, the compression strength of the grouts comprised OPC+EM reveals an optimal dosage: i.e., 20% EM. Moreover, SF generally leads to increase compressive and flexural strength. As the main conclusion, the mechanical properties of cementitious-emulsion grout are highly affected, but grout ingredient types, dosage, and properties.
Highlights
Cement-based grouts are used widely in geotechnical applications [1]
SF, known as condensed silica fume or micro silica, is a fine powder with a high concentration of amorphous silicon dioxide [16]. This substance is a byproduct of the smelting of silicon and ferrosilicon [37]
The results demonstrate that mixtures M0 to M3, which contains variable percentages W/B showed that the fluidity decreases with increasing the percentage of W/B, the highest flow value is 19 s which was produced by 30% of W/B and lower flow value is 9 s which was produced by 45% of W/B
Summary
Cement grouts have been used in soil stabilization, precast construction, structural reconstruction, and other applications in civil engineering. Cement grout is widely used in different applications such as; jet grouting, soil grouting permeation grouting and rock grouting, coating prestressed cables in precast constructions, post-tensioned cable duct grouting, and ground stabilization close tunnels, are all applications for crack injection and filling holes in concrete structures [2,3,4]. The water/cement (W/C) ratio for prestressed cable coating ranges from 0.35 to 0.42, while it for masonry repair and consolidation is in the range of 0.51 [1]. Cement grouts for soil or rock injection are highly fluid hydraulic binders with W/C ratios varying from 1 to 2. W/C ratios for sealing cement grouts are similar to those used for masonry repair, which varies between 0.5 and 1 [6,7]
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