Question

Which among the following when utilized gives good finishing on the both sides of the walls?

(a) Cast-in-situ fly ash walls

(b) Cellular light weight concrete

(c) Sintered light weight aggregates

(d) Fly ash cement putty

I have been asked this question in a job interview.

My doubt is from Ash and its Effects on Boiler Operation and Performance in portion Steam Generators & Accessories of Energy Engineering

Answer 1

Correct option is (a) Cast-in-situ fly ash walls

To explain: Using high fly ash comprising of cement, lime fly ash and sand in appropriate proportions depending upon the quality of fly ash with pre-measured water cement ratio, cast-in-situ can be built. These can be cast to any thickness using steel shuttering. By using this system we can achieve 20% of economy, quicker construction, good finish on both sides of wall and more carpet area.