The water-cement ratio is one of the main factors affecting concrete permeability; small changes in this ratio promote large permeability variations. An important increase of air permeability with the water-cement ratio and preconditioning temperature has been noticed. On the other hand, insignificant ...
with well-controlled loading paths, static tests have been carried out on concrete samples by mean of a very high-capacity triaxial press (stress levels on the order of 1 GPa). It is a longstanding fact that the water/cement ratio (W/C), upon entering the concrete composition, is a majo...
The main objective of this work was to highlight the contribution of cement-to-waterC/Wratio and the fractal dimensionFDmodel to the prediction of the compressive strength of concrete. In particular, the fractal dimensionFDconcept relative to the size distribution of the granular mixtures provided ...
Concrete strength grade is not enough, the water cement ratio does not collapse, leaking, causing more than such as the scope of the problem 翻译结果5复制译文编辑译文朗读译文返回顶部 The strength of cement marking is insufficient, the water ratio is not right, collapses leaking to surpass initia...
Evaluation of Shrinkage Induced Cracking in Concrete with Impact of Internal Curing and Water to Cement Ratio In this paper, the effect of internal curing with pre-soaked lightweight aggregate (PSLWA) on shrinkage and interior relative humidity of four series concretes with compressive strength at ...
Concrete is sensitive to environmental changes, especially during the first few days after casting. Volumetric changes due to drying, temperature, plastic ... A Sivakumar - 《Journal of Civil Engineering & Construction Technology》 被引量: 3发表: 2013年 Effects of water-cement ratio on bond stren...
Figure 1. The data distribution of (a) cement, (b) water, (c) fly ash, (d) coarse aggregate, (e) fine aggregate, (f) SiO22, (g) age, and (h) compressive strength. Table 1. Mathematical factors for the dataset of concrete containing fly ash. Materials and Experimental Design Th...
The fibre-containing composites showed an 8% higher water absorption compared to the non-fibre samples. The exception is the ramie fibres, which reduce water absorption. In general, a positive effect of natural fibers on the properties of cement composites has been noticed, however, in case of...
We propose a new method to estimate the cement content, water content and free water/cement ratio (w/c) of hardened cement-based materials that have unknown mixture proportions and degree of hydration. This method first quantifies the phase composition of the hardened cement paste, i.e. the...
Formation of microstructure in cement pastes and mortars were quantitatively analyzed by the SEM-BSE image analysis. Effects of water/cement ratio and of t... S Igarashi,M Kawamura,A Watanabe - 《Cement & Concrete Composites》 被引量: 236发表: 2004年 Influence of aggregate size, water cement...