Concrete Technology In Concrete

The development of new technology in the material science is progressing rapidly. In last three decades, lot of research was carried out throughout globe in order to improve the performance of concrete in terms of strength and durability. Consequently concrete has no longer remained a construction material but has rather becomes an engineered custom tailored material with several new constituents to meet the specific needs of construction industry. The growing use of concrete in special architectural configurations and closely spaced reinforcing bars have made it very important to produce concrete that ensures proper filling ability, better structural performance and adequate durability. Concrete technology has under gone from macro to micro level study in the enhancement of concrete properties (strength and durability) from early eighties onwards.

In Japan, in early eighties, premature deterioration of concrete structures was detected in almost every part of the country. The main cause of deterioration was found to be inadequate compaction. As a solution of this technical problem, the concept of Self Compacting Concrete was introduced. SCC is a type of concrete that flows by itself without segregation, does not need vibration for full compaction and is environmental friendly due to absence of noise. Self compacting concrete provides robustness in construction and is insensitive to workmanship.

BASIC PRINCIPLE BEHIND SELF COMPACTING CONCRETE (SCC)

The SCC is that which gets compacted due to its self weight and is de-aerated (no entrapped air) almost completely while flowing in the form work. In densely reinforced structural members, it fills completely all the voids and maintains the horizontality of concrete surface after placi...

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...ved to increase the durability as compared to the ordinary concrete.

5. SCC shows narrow variations in properties at the site.

6. SCC is most suitable for concrete filled tube (CFT) technology construction for high rise building.

7. SCC ensures better quality of in-situ pile foundation.

8. SCC reduces the cost of consumption of resources and cost.

Self compacting concrete (SCC) is favorably suitable especially in highly reinforced concrete members like bridge decks or abutments, tunnel linings or tubing segments, where it is difficult to vibrate the concrete, or even for normal engineering structures. The improved construction practice and performance, combined with health and safety benefits makes SCC a very attractive solution for both pre cast concrete and civil engineering construction. Based on these facts it can be concluded that SCC will have a bright future.