Concrete

Pretension concrete, also known as prestressed concrete, is one of the methods to give more strength to the natural weakness of concrete through tension. The way this works is by allowing the tendons to cure in the concrete. After it has cured the tendons are released and the tension is applied. “The analysis for continuous prestressed composite beam covers: load deflection behavior, strain and stress in concrete slab and steel beam, force in shear connector, slipping between concrete and steel

Concrete slab is above Earth foundation type with a single layer of concrete with thickness of typically about 4 inches to 6 inches and sometimes reinforce with steel rods. Steel rods or rebar have a function to make the slab extremely strong and capable of bearing the load. The edges of the foundation are usually thicker as to allow for more strength around the load in this case, the live load and static load of rainwater tank. This type of foundation also may be used with the base soil of low bearing

The behaviour of concrete under a load is an important phenomenon that has to be considered while evaluating and analysing concrete structures. Concrete is one of the most widely used construction materials in the world. So it is essential to understand what concrete is and the properties associated with it. For more than 200 years, this artificial conglomerate stone made up of cement, water and aggregates, has been accepted for its long-lasting and dependable nature. In addition to durability, its

1.0 INTRODUCTION 1.1 CONCRETE: Concrete is a composite material formed by combination of cement, fine aggregates, coarse aggregate and water together in a suitable proportion. This mix form easily workable paste known as plastic wet or green concrete. After mixing and placing the concrete in position the cement and water undergoes hardening, the cement paste in this way bind the aggregate like hard mass, which is called concrete. Now a days concrete is used most commonly as a building material because

Case Study # 4 - Concrete Pumps Portland cement concrete has been used in the field of construction since the early Roman empire, but until the early twentieth century transporting concrete to great heights or distances was a big challenge. With the invention of the concrete pump handling concrete using wheelbarrows or buckets became obsolete because they require less man-power and can reach those hard-to-get places with ease. There are three types of concrete pumps being used in construction today:

Foam concrete advantages Foam Concrete is normal concrete with bubbles of air inside. Therefore it has the same characteristics with many additional advantages. CLC (foam concrete) blocks are used for building cottages, wall insulation in multistory buildings and internal partitions. Also CLC can be produced and poured for floors and roofs on-site. In roofs it can be used because of very good insulating and lightweight. For floors CLC offers faster installation and a less expensive option because

With the development of Roman concrete as well as the design of the Roman arch, the construction of unique innovative aqueducts were constructed. Other structures erected with these design features were colossal Roman Structures such as roads, dwellings, bath house, and amphitheaters. According to Yegul (Accessed 2015), Roman concrete or opus caementicium was developed around 45 BCE. Concrete was used by the Romans as a building material because it converts to a hard surface like a rock when mixed

CONCRETE ASSIGNMNET 1 Concrete Project Report Introduction We were requested to write a report for a client that are looking to build a new parking garage in the Bloemfontein area. The client also requsted from us to not just advise him/her on what type of concrete to be used, but also to give him/her a broad understanding of the different types of concrete. Some of the aspects that will be discussed in this report are as follows: 1. Special concrete and its application 2.

The development of both the arch and concrete have significant roles in the life of Rome, and their use have great results. They showed how the Romans thought and who they believed. Roman concrete was a material used in construction. It was based on hydraulic-setting cement. Roman concrete was different from modern concrete. Roman concrete was durable to its incorporation of volcanic ash preventing cracks from spreading out. Roman sculpture is learnt from the Greeks and the Etruscans. It reached

High-Performance Concrete 1. Introduction Products that last longer are called, high- performance products. Properly proportioned and cured mixtures of super-plasticized concrete, with 0.4 or less w/cm, show a little or no permeability. In fact, super-plasticized concrete mixtures made with blended portland cements containing mineral additives exhibit unusually low permeability ratings in the ASTM C 1202, Rapid Chloride Penetration Test. However, high-performance concrete almost always has