06-09-2022, 09:25 AM
Concrete Transportation and Placement
INTRODUCTION
After the concrete or mortar materials have been batched and mixed, the concrete I mortar mix has to be transported and placed in a formwork.
Concrete transportation has to be done from the mixing point to the placing point in the shortest possible time so that it does not lose its workability. Care should also be taken that the mix does not segregate or bleed but remains a cohesive mass.
Stiffening, bleeding and segregation of concrete while transporting can result in loss of strength, non-uniformity, porosity and poor durability. It is very important that uniformity of concrete is maintained after mixing. In most of the projects, in India, concrete and mortar are transported by a human
chain by head loads. This method of transportation is slow and prone to errors.
Delay in transportation can cause loss of workability and cohesiveness and thereby difficulty in placing and compacting the concrete. Cohesiveness and workability of the concrete mix should be adequate enough to cater to the mode or method and duration of transportation and placement.
Transportation and placement specification should be reviewed and necessary precautions for concreting at night or during periods of extreme heat, extreme cold, wind or rain must be taken. Concrete is required to be transported in both horizontal and vertical directions. Independent of method deployed whether it is using head loads or highly mechanised equipment it is very important that advance planning be done thereby preventing
any problems which could affect the quality of work.
MODE OF TRANSPORTATION
a) Fully Manual
b) Semi-manual and semi-mechanised
c) Fully mechanised
for more details visit or download
INTRODUCTION
After the concrete or mortar materials have been batched and mixed, the concrete I mortar mix has to be transported and placed in a formwork.
Concrete transportation has to be done from the mixing point to the placing point in the shortest possible time so that it does not lose its workability. Care should also be taken that the mix does not segregate or bleed but remains a cohesive mass.
Stiffening, bleeding and segregation of concrete while transporting can result in loss of strength, non-uniformity, porosity and poor durability. It is very important that uniformity of concrete is maintained after mixing. In most of the projects, in India, concrete and mortar are transported by a human
chain by head loads. This method of transportation is slow and prone to errors.
Delay in transportation can cause loss of workability and cohesiveness and thereby difficulty in placing and compacting the concrete. Cohesiveness and workability of the concrete mix should be adequate enough to cater to the mode or method and duration of transportation and placement.
Transportation and placement specification should be reviewed and necessary precautions for concreting at night or during periods of extreme heat, extreme cold, wind or rain must be taken. Concrete is required to be transported in both horizontal and vertical directions. Independent of method deployed whether it is using head loads or highly mechanised equipment it is very important that advance planning be done thereby preventing
any problems which could affect the quality of work.
MODE OF TRANSPORTATION
a) Fully Manual
b) Semi-manual and semi-mechanised
c) Fully mechanised
for more details visit or download
