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has been cited by the following article:

• TITLE: Study of the Mechanical Behaviour of Mortars Modified with Rice Husk Ash

  AUTHORS: Issiaka Sanou, Moustapha Sawadogo, Mohamed Seynou, Lamine Zerbo, Raguilnaba Ouedraogo

  KEYWORDS: Mortar, Rice Husk Ash, Mechanical Strength, Filler Effect, CSH

  JOURNAL NAME: Journal of Minerals and Materials Characterization and Engineering, Vol.7 No.6, October 21, 2019

  ABSTRACT: The purpose of this work is to study the influence of Rice Husk Ash (RHA) on the mechanical strength of mortars. For this purpose, ash was produced by calcining rice husk at 680°C for 5 hours to produce reactive pozzolan. The chemical and mineralogical composition studied by Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) and X-Ray Diffraction (XRD) showed that this ash is rich in amorphous silica. The ash presents a good pozzolanic activity with a lime fixation rate of 100% after only 7 days of treatment. The addition of RHA to cement contributes to the formation of calcium silicate hydrate (CSH) and calcium aluminate hydrate of C3ASH6 type. The presence of RHA in the mortars improves their mechanical strength. This improvement is due to the filler effect of RHA and to formation of the CSH resulting from the pozzolanic reactivity between the amorphous silica of the RHA and the portlandite released by hydration of the cement.