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english to muslim
最后更新： 2021-06-12
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: translted to arabic by misspisces707
♪
最后更新： 2016-10-27
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sd-crackerترجمة translated to arabic by sd-cracker
(rapid footsteps, people shouting indistinctly)
最后更新： 2016-10-27
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♪ and drag your ass across the bed ♪
♪ and drag your ass across the bed ♪
最后更新： 2016-10-27
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i left one suit out on the bed, for the train.
i left one suit out on the bed, for the train.
最后更新： 2016-10-27
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little has been reported on the effect of chemical composition of different volcanic ashes as scm materials. however, pozzolanic properties of volcanic ash mainly depend on the chemical composition, reactive sio2 content, specific surface area, defects and degree of crystallinity (contrafatto, 2017; khan and amin, 2017). volcanic ashes can also be selected and processed by taking into consideration the composition of common phases responsible for strength development in opc and pozzolanic cement, notably calcium silicate hydrate (c-s-h), calcium–alumino-silicate-hydrate (c-a-s-h) gels, and possible other hydration products (kupwade-patil et al., 2018a, 2018b; masmoudi et al., 2017). for instance, kupwade-patil et al. (2018a) observed that addition of fine volcanic ash favored the formation of c-s-h-related phases whereas inclusion of coarser volcanic ashes was dominated by ca-s-h and unreacted mgo phases suggesting their limited involvement in the hydration process. it is noteworthy that the larger the volcanic ash particles, the lower the surface area per unit volume and the less rapid the rate of reaction. some authors have also observed that pozzolanic activity is proportional to the amount of particles with size below 10μm, while particles larger than 45μm do not appear to have a significant effect on the pozzolanic properties (stefanidou, 2016). preheating some volcanic debris may also increase the pozzolanic activity and consequently improve the final strength of the material. kılıc and sertabipoglu (2015) observed that preheating pumice at 1000°c could lead to an increase in the pozzolanic activity of up to about 50% and the compressive strength up to 7%, in blended cement with up to 20% of portland cement replacement. this result suggests that preheating some volcanic ashes may increase the amount of their reactive silica or amorphous phase. in most cases, the reactivity of volcanic ash in cement increases with increase in amorphous fraction and fineness of the ashes (aci committee 232, 2001; celik et al., 2014a; kupwade-patil et al., 2018a; scrivener et al., 2016; stefanidou, 2016). however, the use of volcanic ashes generally lead to longer setting times and lower early strengths in comparison to plain portland cement, but this can be mitigated by prolonged grinding to improve the specific surface area (al-swaidani et al., 2016; binici et al., 2007).
little has been reported on the effect of chemical composition of different volcanic ashes as scm materials
最后更新： 2021-12-02
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