Silica fume
EFFECT OF FLY ASH AND SILICA FUME ON THE SORPTIVITY OF CONCRETE
... and silica fume at equal water/cement ratios and ...age. Silica fume binary and ternary cement concretes have lower sorptivity than CEM I and fly ash binary cement concretes at both early and ...
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Mat. Res. vol.8 número3
... The mortars were prepared using high-early-strength Portland cement (CPV-ARI Plus according to NBR 5733 (type III accord- ing to ASTM C 595). The chemical and physical properties of the cement are shown in Tables 1 and ...
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Rev. IBRACON Estrut. Mater. vol.6 número4
... Corrosion of reinforcement steel in concrete is a world-wide prob- lem, resulting in high costs of rehabilitation and repair of these structures [1, 2]. The costs of maintenance and prevention of structures that was ...
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Rev. IBRACON Estrut. Mater. vol.9 número1
... content, silica fume may provide an increase in the mechanical strength of the material due to its high poz- zolanic ...with silica fume due to an improve- ment in the particle packing of the ...
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Rev. IBRACON Estrut. Mater. vol.9 número4
... Mineral additions can be used as supplementary cementitious material and suppress ASR expansion [14]. The most common materials are natural pozzolans, ly-ash, slag, silica fume and rice husk ash. These ...
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Avaliação do comportamento reológico na retração plástica e na fissuração de argamassas de concreto auto-adensável
... The dosage was based on the Repette-Melo method [5] to produce two lines of self-compacting concrete mortar, one mortar with basal- tic filer addition and another with silica fume addition. This method ...
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On The Mechanical Behavior of Metakaolin Based Geopolymers Under Elevated Temperatures
... X-ray diffraction (XRD) was performed to characterize the crystalline phases of the used materials (metakaolin, blast furnace slag and silica fume) and geopolymer mortars (100MK, 80MK20SF, 60MK40BFS and ...
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Mat. Res. vol.10 número1
... of silica fume and styrene-butadiene latex (SBR) on the microstructure of the interfacial transition zone (ITZ) between Portland cement paste and aggregates ...with silica fume or latex SBR ...
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Cerâmica vol.50 número313
... Reinforced concrete structures installed in coastal zones have constantly been threatened by environmental damaging elements. The chloride ion is known as one of the most aggressive of these elements, causing, among ...
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Rev. IBRACON Estrut. Mater. vol.6 número3
... Prassianakis & Prassianakis [4] evaluated the ability of non-destruc- tive testing to determine the integrity of concrete specimens, and they concluded that this methodology is feasible for blocks evaluation. Hamid ...
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Mat. Res. vol.9 número3
... with silica fume alone because of the higher Ca(OH) 2 ...with silica fume and polymer present an exothermic peak around 350 °C, indicating polymer pyrolysis, as was found from the TG/DTG ...
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Cerâmica vol.63 número367
... of silica fume, was evaluated in order to understand the effect of nano-silica on this mechanical ...of silica fume, was evaluated in order to analyze the effect of nano-silica ...
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Strength Characteristics and Durability Characteristics of Silicafume and Metakaolin based Concrete
... - Silica fume (SF) and Metakaolin are cementitious materials used as admixtures to produce high strength concrete and to reduce the ...Also, Silica fume is used to make durable concrete ...
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Mat. Res.
... still present crystalline phases from metakaolin. Again, metakaolin contains peaks for quartz, muscovite, illite and kaolinite, and the latter does not react to form geopolymer gel (refer to Figures 4.a, 4.b and 4.c). It ...
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Mat. Res. vol.9 número2
... with silica fume and silica from rice ...of silica fume presented low corrosion risks and high impedance module values and significant increases of the concrete resistivity after 22 ...
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Surface Imprinting of Silica Gel by Methyldopa and Its Application in the Solid Phase Extraction Procedure Mohammad Taghi Vardini and Leila Mardani
... of silica gel consists of a core with silicon atoms connected to oxygen atoms via siloxane bonds (bonds of ...the silica gel share their polar ...of silica includes two types of hydroxyl groups: ...
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Kinematic and spermatic recovery after selection by centrifugation in colloid solutions of ovine cryopreserved semen
... in silica colloidal- silane, but were different from those of Thys et ...in silica colloidal-PVP. The colloidal silica coated with PVP was used in centrifugation protocols with the aim of selecting ...
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Recent progress on synthesis of ceramics core/shell nanostructures
... dense silica and CdSe quantum dots (CdSe-QD) - allow for versatile control of CdSe- QD and Au-metal interactions through the control of the size of Au nanoparticles and the thickness of the di- electric ...
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J. Braz. Chem. Soc. vol.27 número7
... metalized silica surfaces. The self-immobilization of polymer onto titanized silica particles produces more homogeneous polymeric coatings and stationary phases without silanophilic ...Zirconized ...
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Structure of weakly bonded PPG-silica nanocomposites
... of silica-polypropyleneglycol (PPG) nanocomposites with weak physical bonds between the organic (PPG) and inorganic (silica) phase, prepared by the sol-gel process, was investigated by small angle X-ray ...
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