Table of Contents
- 1 How do you ensure the quality of concrete on site during construction?
- 2 What is the first test to be done for determining any property of cement?
- 3 How do you evaluate the quality of concrete?
- 4 What is the quality of cement?
- 5 What is soundness test cement?
- 6 What are the field tests on cement?
- 7 What are the preliminary tests for cement?
How do you ensure the quality of concrete on site during construction?
Concrete should be protected from hot and cold weather at early ages. Concreting should not be done at temperature below 4.50C and above 400 In very hot weather water and aggregates should be cooled. Retarders of approved quality can be used. In very cold weather water and aggregates should be heated.
How cement is tested for its quality and strength?
Cement Adulteration Test To check the quality of cement, you can take a pinch of the construction material and rub it between your fingers. If the material feels smooth on your skin, you should go ahead and use it. Adulteration test is more commonly referred to as the fineness test of cement.
What is the first test to be done for determining any property of cement?
consistency test
Explanation: The first test to be done for determining any property of cement is a consistency test which lies between 27 and 29.
What are the qualities of good cement?
The physical properties of good cement are based on:
- Fineness of cement.
- Soundness.
- Consistency.
- Strength.
- Setting time.
- Heat of hydration.
- Loss of ignition.
- Bulk density.
How do you evaluate the quality of concrete?
Abstract: Ultrasonic pulse velocity (UPV) and rebound hammer (RH) tests are often used for assessing the quality of concrete and estimation of its compressive strength. Several parameters influence the property of concrete, such as the type and size of aggregates, cement content and the implementation of concrete.
How many steps are involved in quality check in concrete?
Preconcrete Quality Checks. This stage of quality checks consists of 2 steps. Checking of specification requirements regarding excavation, forms, reinforcement and embedded fixtures etc.
What is the quality of cement?
The cement should be lump- and dust-free and feel cool to the touch, indicating no hydration reaction is taking place. Look at the color. Cement for building construction should be a uniform greenish-gray, while cement for decorative applications is white.
What is fineness test of cement?
The Fineness Test of Cement is done by sieving cement sample through standard IS sieve. The weight of cement particle whose size is greater than 90 microns is determined and the percentage of retained cement particle are calculated. This is known as the Fineness of cement.
What is soundness test cement?
The ability of cement to retain its volume after it gets hardened is known as Soundness of Cement. That means the cement should be at minimum volume change after it gets hardened. The test conducted to identify the excess amount of lime in cement is known as soundness test of cement.
How can we check the engineering quality of cement on site?
It is not possible to check all the engineering qualities of cement on site but there exist some field test which gives us a rough idea of quality of cement. While on site we can perform these field tests to judge the quality of cement. These field tests are as follows:
What are the field tests on cement?
Field Tests on Cement. 1 1. Date of Packing. Date of manufacture should be seen on the bag. It is important because the strength of cement reduces with age. 2 2. Colour. 3 3. Rubbing. 4 4. Hand Insertion. 5 5. Float test.
How do you test strength of a cement block?
Strength test: – Make A block of cement 25 mm x 25 mm and 200 mm long. Immerse the block in water for 7 days. Place the immersed block on supports 15000 mm apart and then load with a weight of 340 N. the block which is made of good cement should not show any sign of failure.
What are the preliminary tests for cement?
These preliminary tests include checking the properties of cement which affect the Cement strength and quality. 1. Date of Packing (MFG Date): Several studies stated that as the Strength of cement reduces as time goes on.