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Effect of Fire Strength of Concrete With Recycled Concrete As Coarse Aggregates (Record no. 55652)

MARC details
000 -LEADER
fixed length control field	03200nam a22001337a 4500
100 ## - MAIN ENTRY--AUTHOR NAME
Personal name	Buller, Abdul Hafeez
--	Supervisor Prof. Dr. Bashir Ahmed Memon
245 ## - TITLE STATEMENT
Title	Effect of Fire Strength of Concrete With Recycled Concrete As Coarse Aggregates
260 ## - PUBLICATION, DISTRIBUTION, ETC. (IMPRINT)
Place of publication	Nawabshah:
Name of publisher	QUEST,
Year of publication	2013.
300 ## - PHYSICAL DESCRIPTION
Number of Pages	51
500 ## - GENERAL NOTE
General note	ABSTRA CT<br/>With voyage reinforced concrete has become most widely used construction material in construction industry. Construction of new buildings in place of old structures in present era is unavoidable particularly in city centers to compensate the growing population and migration from other areas. But this leads to extensive demolishing waste which needs proper management. If this waste can be utilized in new construction, then will not only reduce the waste management but also saves natural sources of aggregates. Any of the structure during its service life has to face lot of hazards, fire is one among them. The behavior of reinforced concrete structures during and after fire has remained active research area. This research work combines both aspects to study the effect of fire on concrete cubes made by replacing 50% natura l coarse aggregates with coarse aggregates from demolished concrete. Demolished concrete in the shape of large blocks is collected.<br/>from Nawabshah city. These large blocks are then processed to maximum of I “size by hammering and sieving.<br/><br/>Using I :2:4 m ix total of 180 cubes in two batches are prepared. In one batch I 00% natural coarse aggregates are used and in second batch 50% natural coarse aggregates are replaced with coarse aggregates from demolished concrete. All cubes are cured for 7, 14 and 28 days. After elapsed time cubes are tested for compressive strength. The<br/>Obtained results are presented in both tabular and graphical format to compare with reference concrete.<br/>7 day cured cubes observed strength reduction of 23.05% at zero hour fire in comparison to reference concrete. Whereas these values for 3, 6, 9 and 12 hours are 25.28%.<br/>30.57%, 37.26% and 47. 14% respectively. These results show that concrete cubes with recycled aggregates survived 75% strength for 3 hour fire and about 53% strength for 12 hour fire. In comparison to 7 days cured cubes the results of 14 days cured with respect to reduction in strength or survived compressive strength arc hcttcr.28 days curing is the standard curing to be done in every project. Compressive strength result of this curing age, in comparison to result of 7 days and 14 days curing are better wit about 6% result for 3 hour fire and about 25% reduction for 12 hour fire. 12 hour is normally good<br/>Enough time to control fire hence can be said that even if fire prolongs for 12 hours recycled concrete can survive up to 75% of its strength. also it is observed from graphical presentation of results that associative from of decrease in strength is same and associative behavior of cubes remained same.<br/> <br/> <br/>graphical presentation of results that associative form of decrease in strength is same and<br/>associative behavior of cubes remained same.<br/><br/>
700 ## - ADDED ENTRY--PERSONAL NAME
Personal name	Department Of Civil Engineering
856 ## - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier	https://tinyurl.com/46tr9fhs
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Koha item type	Thesis and Dissertation

Holdings
Withdrawn status	Lost status	Home library	Current library	Date acquired	Accession Number	Koha item type
		Research Section	Research Section	17/11/2016	MP/04-28	Thesis and Dissertation
		Reference Section	Research Section	26/09/2018	MP/21-210	Thesis and Dissertation