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Questions related from Saurabh Khandelwal
I took a FESEM image of cement paste after 12 hours of hydration. There are numerous fibrillar structures, can anyone help what these structures are (CSH or ettringite)? The hydration was ceased...
16 August 2021 9,733 6 View
I have performed TGA_DSC of cement paste with different clays. Samples 1-4 showed similar total weight loss and DSC curves, but samples 5 and 6 showed less weight loss. As all the samples have...
23 March 2021 9,208 7 View
I am a beginner in rietveld refinement, my samples contain numerous overlapped peaks and amorphous phases. I have few doubts related to rietveld refinement of cement paste: 1. My quantifications...
12 January 2021 9,026 6 View
hi what could be the best way to characterize basalt fiber surface. I have coated Basalt fiber and from FTIR i did not get much information? Is there any other technique with more sensitivity for...
18 December 2018 5,699 4 View
What is the procedure for preparing mortar samples for SEM in order to study the micro structure of fractured surface?
13 September 2018 6,548 4 View
How do we calculate fiber weight in fiber reinforced mortar composites? For example: How much fiber is required to prepare a composite with 1.5 volume % of fiber ?(fiber density:2.56 and cement...
25 April 2018 6,439 11 View
I have tested the mortar beam specimen according to ASTM D790. Should i use ASTM C1609 / C1609M - 12 ? ASTM D790: Standard Test Methods for Flexural Properties of Unreinforced and Reinforced...
15 December 2017 3,067 5 View
Quantification of phases in cement paste is quite tricky because of preferential orientation and carbonation which depends on sample preparation. Here is an example #cement #datafrommylab...
01 January 1970 3,342 0 View
