Clc Bricks Project Analysis
PROJECT PROFILE
FOR
CELLULAR LIGHT WEIGHT (CLC)
&
SAND LIME BRICKS
PREPARED BY
8TH FLOOR, PARISHRAMA BHAVANAM,
BASHEERBAGH, HYDERABAD www.apitco.org 1.1
INTRODUCTION
CLC (Cellular Lightweight Concrete):
It is a version of lightweight concrete that is produced like normal concrete under ambient conditions. It is produced by initially making a slurry of Cement +Sand + Fly Ash
(constituting 26% - 34 % content) + water, which is further mixed with the addition of preformed stable foam in an ordinary concrete mixer under ambient conditions. The mixture is either poured or pumped into assembled moulds of blocks or formwork of reinforced structural elements or poured onto flat roofs or voids for thermal insulation or filling. The foam imparts free flowing characteristics to this slurry due to ball bearing effect of foam bubbles enabling it to easily flow into all corners and compact by itself in the moulds/forms without requiring any kind of vibration or compaction.
Sand Lime Bricks (SLB):
Sand lime bricks are manufactured by mixing sand, fly ash and lime in desired proportion that may be followed by chemical accelerator during wet mixing. This mixture is moulded under pressure.
The green bricks can be air cured for 24-48 hours and then steam cured in autoclave at desired pressure and temperature. The green bricks may be steam / hot water cured at atmospheric pressure also.
In presence of moisture, fly ash reacts with lime at ordinary temperature and forms a compound possessing cementitious properties. After reactions between lime and fly ash, calcium silicate hydrates are produced which are responsible for the high strength of the compound. Bricks made by mixing lime and fly ash are, therefore, chemically bonded bricks. These bricks are suitable for use in masonry just like common burnt clay bricks. These bricks have the following advantages over the clay bricks:
1. Possess adequate crushing strength as a load-bearing member.
FOR
CELLULAR LIGHT WEIGHT (CLC)
&
SAND LIME BRICKS
PREPARED BY
8TH FLOOR, PARISHRAMA BHAVANAM,
BASHEERBAGH, HYDERABAD www.apitco.org 1.1
INTRODUCTION
CLC (Cellular Lightweight Concrete):
It is a version of lightweight concrete that is produced like normal concrete under ambient conditions. It is produced by initially making a slurry of Cement +Sand + Fly Ash
(constituting 26% - 34 % content) + water, which is further mixed with the addition of preformed stable foam in an ordinary concrete mixer under ambient conditions. The mixture is either poured or pumped into assembled moulds of blocks or formwork of reinforced structural elements or poured onto flat roofs or voids for thermal insulation or filling. The foam imparts free flowing characteristics to this slurry due to ball bearing effect of foam bubbles enabling it to easily flow into all corners and compact by itself in the moulds/forms without requiring any kind of vibration or compaction.
Sand Lime Bricks (SLB):
Sand lime bricks are manufactured by mixing sand, fly ash and lime in desired proportion that may be followed by chemical accelerator during wet mixing. This mixture is moulded under pressure.
The green bricks can be air cured for 24-48 hours and then steam cured in autoclave at desired pressure and temperature. The green bricks may be steam / hot water cured at atmospheric pressure also.
In presence of moisture, fly ash reacts with lime at ordinary temperature and forms a compound possessing cementitious properties. After reactions between lime and fly ash, calcium silicate hydrates are produced which are responsible for the high strength of the compound. Bricks made by mixing lime and fly ash are, therefore, chemically bonded bricks. These bricks are suitable for use in masonry just like common burnt clay bricks. These bricks have the following advantages over the clay bricks:
1. Possess adequate crushing strength as a load-bearing member.