Investigation of the Effect of Diatomite Powder Replacement Instead of Silica Fume in Reactive Powder Concrete (RPC)

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Chakherlou javid; Shervanitabar Bahman

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Journal: JOURNAL OF CONCRETE RESEARCH Year:2019 | Volume:12 | Issue:1 Page(s): 119-132

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Title

Investigation of the Effect of Diatomite Powder Replacement Instead of Silica Fume in Reactive Powder Concrete (RPC)

Author(s)

Chakherlou javid | Shervanitabar Bahman | Issue Writer Certificate

Keywords

RPCQ1

Reactive Powder ConcreteQ1

Diatomite PowderQ1

ConsistencyQ1

Compressive StrengtheQ1

Abstract

In the present study, after obtaining an optimal mixing plan and making concrete samples, in order to investigate changes in the amount of replacements of diatomite instead of Silica Fume, with the aim of reducing the price of RPC production, six mixing plans were considered. These six mixing plans are containing 0, 25, 50, 75 and 100 percent Diatomite Powder, and the final design is the same as 100% Diatomite Powder with an increase of 14% water due to the Consistency correction. The used Diatomite Powder is from Mamaghan mines, which is used without cook and raw and cheap. On the other hand, the available building materials collection and usable in RPC is increased. The flow table test is used for checking Consistency and workability of RPC. Samples were cured in water at 25 and 50 degrees Celsius at the age of 7, 28 and 90 days, then pressure and tensile tests where done, and also water absorption at the age of 28 days and water absorption during the curing. The results indicate that the highest compressive strength for concrete with 25% Diatomite Powder is obtained, which compressive strength is 87. 2 MPa for 90 days. Silica Fume and Diatomite Powder are both highly reactive and chemically active silicon. Therefore, we expected that there was no problem in terms of compressive strength and tensile strength during the above-mentioned substitutions. The results of the experiments clearly showed that Diatomite Powder could be used as a substitute for silica fume in the manufacture of RPC, and also the results indicated that the curing temperature had a significant effect on the initial resistance of RPC, so that with increasing temperature the compressive strength, tensile strength and water absorption also increase.

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APA: Copy

Chakherlou, javid, & Shervanitabar, Bahman. (2019). Investigation of the Effect of Diatomite Powder Replacement Instead of Silica Fume in Reactive Powder Concrete (RPC). JOURNAL OF CONCRETE RESEARCH, 12(1 ), 119-132. SID. https://sid.ir/paper/197190/en

Vancouver: Copy

Chakherlou javid, Shervanitabar Bahman. Investigation of the Effect of Diatomite Powder Replacement Instead of Silica Fume in Reactive Powder Concrete (RPC). JOURNAL OF CONCRETE RESEARCH[Internet]. 2019;12(1 ):119-132. Available from: https://sid.ir/paper/197190/en

IEEE: Copy

javid Chakherlou, and Bahman Shervanitabar, “Investigation of the Effect of Diatomite Powder Replacement Instead of Silica Fume in Reactive Powder Concrete (RPC),” JOURNAL OF CONCRETE RESEARCH, vol. 12, no. 1 , pp. 119–132, 2019, [Online]. Available: https://sid.ir/paper/197190/en

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