Construction joints are required when the concreting has to be stopped for the day or more than 30minutes. In such case, typical construction joints shall be provided so that bond is maintained between set concrete and fresh concrete. Below are some images showing correct method of construction joints to be provided in columns, beams and(…)
Quality Control Guide
QUALITY CONTROL OF LIGHTWEIGHT CONCRETE
Quality control of lightweight concrete To get good normal weight concrete, an engineer writes a good specification and sees that concrete quality is assured by proper control procedures at the job. With lightweight concrete, the engineer specifies a C330* aggregate and the 28- day strength and air-dry weight necessary to meet design requirements. Slump and(…)
DEGREE OF WORKABILITY FOR DIFFERENT PLACING CONDITIONS
DEGREE OF WORKABILITY FOR DIFFERENT PLACING CONDITIONS Placing Condition Degree of Workability Slump (mm) Binding concrete, Shallow Sections Pavement using pavers Very low Use compacting factor test as per IS: 1199 Mass concrete, Lightly reinforced sections in slabs, beams, walls, columns, foors, hand placed pavements, canal linings, strip footings Low 25-75 Heavily Reinforced sections(…)
QUALITY CONTROL MEASURES AT SITE
Study duties responsibilities, Tender specification, standards, codes of practice and work instruction.
Evolve effective acceptance/rejection procedures for construction materials in coordination with the project purchase department.