Effect of micro-silica loading on the mechanical and acoustic properties of cement pastes

Shebl, S. S.; Seddeq, H. S.; Aglan, H.

doi:10.1016/j.conbuildmat.2011.04.021

Cited by 28 publications

(8 citation statements)

References 9 publications

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“…To eliminate influence of larger nucleation area (caused by presence of fine particles in RCP) on hydration process the inert silica sand powder was used to comparison. Due to his crystalline character, the pozzolanic activity of SiO 2 should be minimal compared with amorphous SiO 2 , which is used as reactive additive [10,11]. Comparison of those materials combined with cement can highlight the binder properties of RCP and influence of recycled concrete powder on hydration process can be defined [12,13].…”

Section: Introductionmentioning

confidence: 99%

Hydration Process and Mechanical Properties of Cement Paste With Recycled Concrete Powder and Silica Sand Powder

Topič

Prošek

2017

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Abstract. Recycled concrete powder (RCP) mostly consisting of cement paste could be reused as partial cement replacement. The aim of this paper is to compare hydration and mechanical properties of RCP and two types of silica sand powder (SSP). Comparison of those materials combined with cement can highlight the binder properties of recycled concrete powder. Using of two types of SSP also show an influence of their fines on hydration process and mechanical properties. Particle size analysis and calorimetric measurement were carried out and mechanical properties such as bulk density, dynamic Young's modulus and compression strength were examine. Calorimetric measurement proves the presence of exposed non-hydrated particles in RCP that can react again. However lower density of old cement paste in RCP overweight the mentioned potential of RCP and mechanical properties are decreasing compared with reference cement paste and cement paste SSP.

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Section: Introductionmentioning

confidence: 99%

Hydration Process and Mechanical Properties of Cement Paste With Recycled Concrete Powder and Silica Sand Powder

Topič

Prošek

2017

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“…The ultra fine sand (UFS) modifier is microscale crystalline silica which is an industrial waste available in Egypt [1]. This study represents the extension for the previous work that aimed to investigate the role of UFS in enhancing the mechanical and physical properties of cementitious pastes.…”

Section: Introductionmentioning

confidence: 76%

“…The sand used as coarse aggregate was natural siliceous sand with grain size ranging from 0.06 to 5 mm as adopted by sieve analysis. While, the UFS microscale silica modifier was used as fine aggregate, which was an industrial waste [1]. Particle-size analysis for UFS was performed using a laser beam diffraction technique (LBD).…”

Section: Methodsmentioning

confidence: 99%

Using of Microsilica for Strength Improvement of Fiber Reinforced Cementitious Surface Compounds

Shebl

Khalil

Shoukry

2013

ISRN Materials Science

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This study represents an extension work to investigate the role of ultra fine sand (UFS) in enhancing the mechanical properties of fiber reinforced cementitious compounds. The micro-structural origins were identified by scanning electron microscope (SEM). About 50% of UFS had a diameter of less than 20 m. Ordinary Portland Cement (OPC) was partially substituted by UFS at 3, 5, 7 and 10% by weight of binder. It was found that as UFS loadings increase, the flexural, compressive, and tensile strengths increased up to about 5% UFS loading by 12.9, 15.7 and 30.1%, respectively, thereafter, a decrease in these properties was observed. This can be attributed to the pozzolanic effect besides the filling effect of UFS resulting in enhancing the interfacial bonds between the sand grains and hydration products that makes the paste more homogeneous and dense. The effect of both short natural and artificial fiber loadings on the structural performance of compounds was also studied. Loadings of 2%, by weight, of short natural date palm leaves' midribs fibers (DP) and artificial polypropylene fibers (PP) were added to the 5% UFS blended mix. An increase in both flexural and tensile strength was achieved, while a decrease in the compressive strength was observed.

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“…2SiO 2 ) which is mainly amorphous material and behaves as a highly reactive artificial pozzolan; Also the reaction of alumino -silicate in NMK with free lime liberated during cement hydration. As well as the packing effect of NMK as filter into interstitial spaces inside the skeleton of hardened microstructure of cement paste [8].…”

Section: Fig 1 the Variation Of Change The Compressive Strength With Different Ratios Of Nmk At Different Curing Agesmentioning

confidence: 99%

The Mechanical Properties of the Ordinary Portland Cement Containing Nano Metakaolin

Hassan

2020

Egypt. J. Physics

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I N THIS work, the crystalline kaolin granules were grinded in a ball milling machine until reached to a nano scale size. The nano-kaolin was activated by thermal treatment. The nano-kaolin was heated for 2 hr at 750 o C to transfer the nano kaolin from the crystalline phase into the amorphous phase. The activated amorphous nano-metakaoline was investigated by differential thermal analysis (DTA), X-ray diffraction (XRD) and scanning electron microscope (SEM).The activated nano-metakaoline was replaced by different ratios of (OPC) as 2%, 4%, 6%, 8%, and 10% by weight of cement. The compressive strength was measured at different curing times 3, 7, 14, 21 and 28 days. The thermal treatment of nano kaoline leads to the change from crystal into amorphous phase, as the decreasing of the grain size. It obvious that the compressive strength is increased, and at the concentration of 10% of nano metakaolin by 31%.

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Effect of micro-silica loading on the mechanical and acoustic properties of cement pastes

Cited by 28 publications

References 9 publications

Hydration Process and Mechanical Properties of Cement Paste With Recycled Concrete Powder and Silica Sand Powder

Hydration Process and Mechanical Properties of Cement Paste With Recycled Concrete Powder and Silica Sand Powder

Using of Microsilica for Strength Improvement of Fiber Reinforced Cementitious Surface Compounds

The Mechanical Properties of the Ordinary Portland Cement Containing Nano Metakaolin

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