Vivek Gupta

7 Questions 8 Answers 0 Followers

Questions related from Vivek Gupta

Why alkali activated solution some times get self-condensed without precursor?

I observed sometimes self condensation in alkali activated solution without adding any precursor. I mixed 10 M NaOH solution and liquid sodium silicate (Modulus - 2.94 - 3.73) in 1:1 by weight...

30 September 2020 6,305 5 View

What are the technical standards related to fly ash and fly ash bricks in different countries ?

I need help to search technical standards related to fly ash bricks and fly ash in different countries. I have the Indian standard (IS 3812 and IS 15648) and American standard (ASTM C 618)...

17 October 2019 1,420 2 View

How can we calculate total pore volume of concrete by BET Data?

I have the data of adsorption and desorption curve at relative pressure from 0.10 to 0.99 at every 0.10 interval. Can anyone guide me how I can calculate the total pore volume of concrete samples.

19 November 2018 1,272 5 View

What is the correct method to prepare geopolymer hardener component?

I have mixed NaOH and Na2SiO3 24 hours prior to casting. Sometimes, when I shaked the hardner just before casting, it suddenly hardened in a dense viscous white material. Some time when I used the...

27 August 2018 1,113 2 View

What are the direct methods to quantify the homogenity of low moist geopolymer mortar mix?

I want to evaluate the effect of mixing stratagies on fresh mix of fly ash brick. Is there any direct method to check the homogenity of geopolymer brick mix?

15 August 2018 2,667 4 View

What is the most appropriate method to determine the optimum liquid content for low moist geopolymer bricks for maximum density ?

I am working on geopolymer mix and want to identify the optimum liquid content to obtain maximum density, indirectly maximum compressive strength.

06 August 2018 7,011 2 View

Does constant K remain same for calculation of specific surface area (S=K√T) of different material?

I want to determine fineness in terms of specific surface area for different materials such s fly ash, OPC and PPC cement using blaine air permeability apparatus. Should I need to determine...

04 August 2018 1,952 3 View