scholarly journals Experimental Investigation of Recycled Coarse Aggregates on Partial Replacement of Cement with Silica Fume

2021 ◽  
Vol 1026 (1) ◽  
pp. 012009
Author(s):  
S Manivel ◽  
N Pannirselvam ◽  
J Rajprasad ◽  
T.S. Hemanarayanan
Keyword(s):  
Experimental Investigation ◽  
Silica Fume ◽  
Partial Replacement ◽  
Coarse Aggregates

scholarly journals Experimental Investigation on Rcc by Using Multiple Admixtures

2018 ◽  
Vol 7 (3.3) ◽  
pp. 14 ◽  
Author(s):  
Professor P.Venkatreddy ◽  
A Siva Krishna ◽  
G SwamyYadav
Keyword(s):  
Mechanical Properties ◽  
Experimental Investigation ◽  
Compressive Strength ◽  
Silica Fume ◽  
Research Work ◽  
Copper Slag ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Flexure Strength ◽  
Concrete Properties

In this article, the effect of replacing cement with silica fume and fine aggregate with copper slag has been investigated. For this research work, concrete of M40 grade is prepared and evaluated for fresh and harden concrete properties such as compressive strength, tensile strength and flexural strength. Further, the cement is replaced with silica fume at 0, 2, 4, 6, 8 and 10 % and fine aggregate replaced with copper slag at 0, 10, 20, 30, 40 and 50 %. Compressive strength, strength and Flexure strength have been tested. It is observed from the results that the use of silica fume and copper slag as partial replacement material improves mechanical properties of the concrete. Concrete with 40 % copper slag and 8 % silica fume shows better performance among all the mixes.  

scholarly journals Effects of Partial Replacement of Coarse Aggregates with Reclaimed Rubber on the Mechanical Properties of Hardened Concrete

2020 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Kanmalai Williams ◽  
Eman Muhye Adeen Muhye Adeen Al-Hatali
Keyword(s):  
Compressive Strength ◽  
Silica Fume ◽  
Partial Replacement ◽  
Hardened Concrete ◽  
Coarse Aggregates ◽  
Concrete Members ◽  
Tension Tests ◽  
Base Study ◽  
Concrete Mix ◽  
Maximum Compressive Strength

<p>The replacement of conventional aggregates with alternate materials like Reclaimed Rubber (RR) results in reduction of self-weight and compressive strength of concrete. This reduction in self-weight further decreases the dead load which contributes towards contraction in size of concrete members and reinforcement requirements. This diminution in compressive strength is compensated by replacing cement with supplementary materials like Silica Fume, Fly Ash or GGBS. This research focuses on the effects of partial replacement of cement and coarse aggregates with Silica Fume (SF) and Reclaimed Rubber (RR) respectively in the concrete mix. Concrete mix was prepared for M20 grade by replacing cement and coarse aggregates with SF and RR respectively for cube and cylinder samples. A base study has been carried out through compression and split tension tests by partially replacing cement with SF in 3 percent increments up to 24 percent. Maximum compressive strength of 19.6N/mm<sup>2</sup>, 24.2N/mm<sup>2</sup> and 32.5N/mm<sup>2</sup> was obtained at 12% replacement of cement with SF by weight while testing specimens after 7, 14 and 28 days of curing. Maximum strength of 2.4N/mm<sup>2</sup>, 2.9N/mm<sup>2</sup> and 3.1N/mm<sup>2</sup> was obtained during split tension tests conducted after 7, 14 and 28 days of curing period. Further compression and tension tests were conducted replacing cement with 12%SF along with various proportions of RR replacing coarse aggregates after different curing periods. Experiments reveal that a combination of 12%SF and 9%RR replacement produces maximum compressive strength of 19.2N/mm<sup>2</sup>, 23.1N/mm<sup>2</sup> and 29.4N/mm<sup>2</sup> after curing the samples for 7, 14 and 28 days respectively. The tensile strength decreases as the rubber content is increased in the concrete mix along with optimum SF when compared with normal mix.</p>

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