ACI method of concrete mix design is based on the estimated weight of the concrete per unit volume. This method takes into consideration the requirements for consistency, workability, strength and durability. This article presents ACI method of concrete mix design. ...
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Testing of Sand Quality at Construction Site for Concrete
There are different methods for testing of sand quality at construction site for concrete construction. Quality of sand is as much of importance as other materials for concrete. Aggregate most of which pass through 4.75 mm IS sieve is known as ...
CONCRETE WATERPROOFING BY POLYETHYLENE FILMS
Polyethylene Films are used for waterproofing in Walls or base of Structures. Water proof treatment is applied as outlined and as per sequence given below: a) The concrete surface is made smooth with 12 mm cement plaster 1:6 ii) Apply ...
Compressive Strength of Concrete Cylinders
The compressive strength of the concrete cylinder is one of the most common performance measures performed by the engineers in the structural design. Here, the compressive strength of concrete cylinders is determined by applying continuous load over the cylinder until ...
Core Sampling and Testing of Concrete and Factors Affecting Strength
Concrete cores are used for testing of actual properties of concrete in existing structures such as strength, permeability, chemical analysis, carbonation etc. Sampling of concrete cores and testing its strength is described. While Rebound Hammer, CAPO/Pullout, Windsor probe and ultrasonic ...
Stripping Value Test On Road Aggregates
What is Stripping Value Test? The stripping value of aggregates is determined as the ratio of the uncovered area observed visually to the total area of aggregates, expressed as a percentage. Bitumen and tar adhere well to all normal types ...
REQUIREMENTS OF CONCRETING IN SPECIAL CASES
Sometimes concreting is required in Special Cases such as cold weather, hot weather, deep lifts, mass concrete, along coastal areas, underwater concreting etc. For these special cases, following requirements should be considered before placement of concrete. Concreting in deep lifts ...
Units of Measurement for Payments of Civil Construction Works
Units of Measurement for Payments of Civil Construction Works Units of Measurements for payment of construction works in civil engineering projects are given in table below: Sl. No. Civil Construction Works Units of measurement Unit of payment 1 Earthwork: Excavation, ...