Silica fume (SF), also known as micro-silica, is a spherical amorphous silica originally being a byproduct in the metallurgy from fume flue, captured by cyclone dust …
With treated silica fume 0.2% 215 With silane and untreated silica fume 0% 197 With silane and untreated silica fume 0.2% 218 [19, 20]. The effectiveness of silane for cement is due to the reactivity of its molecular ends with OH groups and the presence of OH groups on the surface of both silica and cement. Table I [19, 20] shows that the ...
The effects of silane treatment of the silica fume and of the use of silane as an additional admixture are also addressed. bstract">The effects of silica fume as an admixture in cement-based ...
Table 1 shows that the silane treatment causes the silica fume mortar mix to increase in workability (slump). With silane-treated silica fume and no water-reducing …
🕑 Reading time: 1 minute Silica fume concrete is composed of cement, silica fume, fine aggregate, coarse aggregate, and water. Fresh and hardened properties of silica fume concrete is superior to conventional concrete. For instance, it has higher compressive and flexural strength. The durability of this type of concrete is superior to conventional …
Semantic Scholar extracted view of "Improving silica fume cement by using silane" by Yunsheng Xu et al.
The RFC had average damping ratio of 0.02146 at 28 days, and it improved around 21.76% when replacing cement with 10wt% of silica fume due to the large interface area between silica fume particles ...
Abstract. Silica fume concretes have been used since the mid-1970s, in many areas of the world. Such uses have included high strength, high chemical …
Dispersing silica fume in cementitious materials by silane copolymerized polycarboxylate Superplasticizer: On the role of dispersion effectiveness as a function of …
Improving silica fume cement by using silane. Deborah Chung. 2000, Cement and Concrete Research. See Full PDF Download PDF. See Full PDF Download PDF.
Silane modification can improve the flowability and mechanical strength of cement mortars [27]. CS and sulfate resistance of cement mortars were enhanced by introducing tetraethyl orthosilicate [28]. ... paper and detergent manufacturing (Shuali et al., 2011). Silica fume, an extremely fine amorphous silica powder being a by-product from …
Silane provides a network of covalent coupling among the silica fume particles, thereby increasing both the specific heat and the thermal conductivity, in addition to increasing …
This trend applies whether the silica fume is as-received or silane-treated. For any of the formulations, silane-treated silica fume gives substantially higher strength and modulus than as-received silica fume. The highest tensile strength and modulus are exhibited by cement paste with silane-treated silica fume and silane-treated fibers.
Silica fume irritants formed by silane gas. Silane forms silica fume irritants when exposed to air. Silane gas has a sharp, acrid smell that's similar to acetic acid, but these fume irritants have little to no odor. Because silane reacts with air, it might seem simpler to just lump these two substances together and think that silane is odorless ...
latex, silica fume, and carbon fibers [1,7]. This paper has attained a specific heat increase of up to 50%, in addition to a thermal conductivity increase of 38%. The admixtures used in this paper are silica fume and silane together. Silane is molecular, but is not a polymer. Silane has been previously used as a coating on admixtures
Silica fume is very fine noncrystalline silica pro-duced by electric arc furnaces as a by-product of the production of metallic silicon or ferrosilicon alloys. It is a powder with …
ever, silica fume causes workability loss, which is a barrier against proper utilization of silica fume concrete [11]. In this paper, we report that the workability of silica fume mor-tar is greatly enhanced by using silane-treated silica fume, i.e., silica fume that has been coated with a silane coupling agent prior to incorporation into the mix.
DOI: 10.1016/S0008-8846(98)00228-2 Corpus ID: 30648983; Improving the workability and strength of silica fume concrete by using silane-treated silica fume @article{Xu1999ImprovingTW, title={Improving the workability and strength of silica fume concrete by using silane-treated silica fume}, author={Yunsheng Xu and D. D. L. …
The effects of silane treatment of the silica fume and of the use of silane as an additional admixture are also addressed. The effects of silica fume as an admixture in cement …
The use of silica fume in the polymer composite is one of the research innovations. Silica fume is a super‐fine spherical powder that is collected as a by‐product. The silane is used to better distribute and optimal interaction of the silica fume in epoxy. Sol‐gel is one of the methods to synthesis of silica fume.
Silane and silica fume together are effective admixtures for increasing significantly both the specific heat and the thermal conductivity of cement paste. Silica fume alone increases the specific heat but decreases the thermal conductivity. Silane provides a network of covalent coupling among the silica fume particles, thereby …
It is generally accepted that silica plus silane, while about equal to carbon blacks under modest road-wear conditions, is still inferior at the highest severity.) ... Silica fume is a by-product of the reduction of quartz with carbon in electric arc furnaces used for the manufacture of silicon and silicon alloys. Originally this by-product was ...
Huang, Jian and Zhao, Yuting and Wang, Xin and Manuka, Mesfin and Hu, Hailong and Ding, Zhaoyang and Yin, Haibo and Ma, Baoguo, Dispersing Silica Fume in Cementitious Materials by Silane Copolymerized Polycarboxylate Superplasticizer: On the Role of Dispersion Effectiveness as a Function of Silane Concentration.
The effects of silane treatment of the silica fume and of the use of silane as an additional admixture are also addressed. bstract">The effects of silica fume as an admixture in cement-based ...
The effects of silane treatment of the silica fume and of the use of silane as an additional admixture are also addressed. bstract">The effects of silica fume as an admixture in cement-based ...
The results of the tests on the polymer composites indicated that the best ratios were 30%, 5% and 1% for separately added marble dust, silica fume and nano-silica groups, respectively, while the ...
The intermilling of silica fume with the cement in production is simultaneously a safeguard against alkali-silica expansion and an improvement of cementing qualities. Some consideration is also given to post-hardening treatment of vulnerable concrete by means of soaking with silane.
In this paper, we also report that the combined use of silane-treated carbon fibers and silane-treated silica fume results in mechanical properties that are superior to those at-. * Corresponding author. Tel.: (716) 645-2593, ext. 2243; Fax: (716) 645-3857; E-mail: [email protected]. tained by silane-treated carbon fibers in combination ...
[PDF] Improving silica fume cement by using silane | Semantic Scholar. DOI: 10.1016/S0008-8846 (00)00337-9. Corpus ID: 33515255. Improving silica fume cement …
- The surface treatment of silica fume with silane coupling agent prior to incorporation in a cement mortar resulted in composites... The surface treatment of silica fume with silane coupling agent prior to incorporation in a cement mortar resulted in composites exhibiting increases in loss tangent by 5%–200% and storage modulus by 10%–20% ...
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FT-IR spectra of surface-modified silica sol with various silane coupling agents in ranges of (a) 500 − 4000 cm − 1 and (b) 1200 − 4000 cm − 1. Full size image ... Suntako, R.: Effect of modified silica fume using MPTMS for the enhanced EPDM Insulation. Polymers. 13, 2996 (2021)
The surface treatment of silica fume with a silane cou- [14] Pu-Woei Chen, D.D.L. Chung, Carbon Fiber Reinforced Concrete as pling agent prior to incorporation into mortar was found to a Smart Material Capable of Non-Destructive Flaw Detection, Smart Mater Struct 2 (1993) 22–30. greatly enhance the workability of the silica fume mortar [15 ...
The surface modification of silica fume was made by using a silane coupling agent. The storage modulus and the loss tangent of different cement mortars after adding the silane-treated silica fume ...
Synthetic amorphous silica nanoparticles (SASNs) comprise a wide spectrum of materials synthesized by high-temperature, pyrolytic, or low-temperature, colloidal, procedures 8,9,10,11,12,42,295,312 ...
SikaCem®-133 is a high performance, ready-to-use, non-accelerated, cementitious, polymer-modified, silica fume enhanced mortar with a dust control agent. SikaCem®-133 is formulated for machine applications using dry or wet process shotcrete equipment. One-component, ready to use mortar. Excellent adhesion to currently prepared, sound …
DOI: 10.1016/S0008-8846(00)00296-9 Corpus ID: 43764971; Cement of high specific heat and high thermal conductivity, obtained by using silane and silica fume as admixtures @article{Xu2000CementOH, title={Cement of high specific heat and high thermal conductivity, obtained by using silane and silica fume as admixtures}, …
It was attributed to the better dispersion of the silanized silica fume in the epoxy matrix due to steric stabilization of the nanoparticles that prepared by hindrance of the grafted silane groups ...
Silica fume, a fine particulate, is an admixture that can be used to improve the degree of fiber dispersion [14], [16] and to improve the bond between fibers and cement matrix [17].Polymers are admixtures that can be used to improve the bond between fiber and cement matrix [16], [17], [18], [19].In this paper, we report that silane (molecular, but …