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Questions related from Saurabh Khandelwal
I am really curious to know why we make clinker in oxidizing conditions? of course because of burning the fuel for the kiln but do the environment really affects the clinker quality. What will...
23 December 2022 7,155 1 View
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 9,749 6 View
Is it possible to use Portlandite (Ca(OH)2) percentage (determined by TGA) as an internal standard phase to determine absolute phases in Rietveld refinement of cement paste?
25 May 2021 8,377 5 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 9,215 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 9,051 6 View
In my sample, I got 4 DTG peaks for the (OPC) cement paste hydrated for 28 days. The peaks for portlandite and calcite are very clear but the peaks for ettringite and C-S-H are bit confusing. What...
01 December 2020 468 8 View
Which one is more appropriate for determining the cement phase composition for studying the effects of additives on cement hydration?
31 July 2020 5,539 3 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 5,715 4 View
what information can we get from Nyquist Plot? Is there any relationship between solid electrolyte interphase (SEI) and charge transfer resistance? I read that the thickness of SEI will increase...
21 October 2018 3,468 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 6,570 4 View
how to decide the superplasticizer (water reducing agent) dosage in mortar mixture? In some research articles, dosage was calculated either by weight % of the cement or density of the fresh...
04 September 2018 2,300 14 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 6,459 11 View
I want to determine mortar workability but i don't have test apparatus as mentioned in ASTM C1437. Is there any other way to check the same ? What could be the effect of inadequate workability on...
20 April 2018 3,716 4 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 3,073 5 View
I want to design a mortar sample and fiber reinforced mortar sample with predetermined compressive strength.
30 November 2017 5,583 15 View
Clinkerization of Cement, hydration
09 January 2015 6,746 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 3,352 0 View
