Tag Archives: concrete construction
Health and Safety in Concrete Construction
While there are many things important to concrete construction, such as quality work and making a profit, health and safety must always be the No. 1 priority. For that reason, we are starting with safety to emphasize its importance as critical...
Underwater Antiwash Concrete
Although underwater concreting has been in use for a long time, development of the technique has mainly proceeded in the areas of concrete placing method and improvements to the construction machinery. The prepacked concrete method, tremie...
Specification for Concrete Batching and Mixing in Construction Project
Equipment
The Contractor shall provide a modern and dependable wet batch?type mixing plant having sufficient capacity to complete the work within the established progress schedule. Dry batch-type mixing plant shall not be used. Separate bins...
3 Types of Concrete Joints
In order to prevent concrete structures from damage caused by plastic shrinkage, thermal shrinkage, settlement, movement…, concrete joints are required. There are 3 common types of concrete joints as outlined bellows.
1. Contraction (Control)...
Types of Concrete Admixtures
Chemical concrete admixtures are material in the form of powder or fluids that are added to concrete to give it certain characteristics not obtainable with plain concrete mixes. In normal use, admixture dosages are less than 5% by mass of cement...
Roller Compacted Concrete RCC
Roller Compacted Concrete (RCC) is, as it name implies, concrete compacted by roller. It is therefore differs from conventional concrete in its consistence as it must support rollers in its unhardened state.
The RCC concrete mix must be dry...
Shotcrete
As a structural material, most people are familiar with concrete. However, not everyone is familiar with the form of concrete known as shotcrete. Here is some background on shotcrete, including how it is used in building projects today.
Essentially,...
Specification for Placing of Concrete
Concrete shall be deposited as nearly as possible to its final position and shall be placed in layers not more than 30 cm thick. Concrete shall be placed at such a rate that it is at all times plastic and will flow readily around reinforcement...
Measures to avoid cracking in fresh concrete
Generally, the contractor shall allow for all necessary measures to monitor and avoid cracking in fresh hydrating concrete, regardless the size or volume of the pour. Such measures shall be to the satisfaction of the Engineer and shall be such...