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 ...

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 ...

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.

Improving silica fume cement by using silane. Deborah Chung. 2000, Cement and Concrete Research. See Full PDF Download PDF. See Full PDF Download PDF.

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

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 ...

Improving silica fume cement by using silane. Yunsheng Xu, D.D.L. Chung* Composite Materials Research Laboratory, State University of New York at Buffalo, Buffalo, NY …

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 …

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 …

Due to the addition of silica fume and amino vinil silane, Xu and Chung [7] increased the thermal capacity of cement mortars in 50% and its thermal conductivity in 38%, as well as the compressive ...

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 ...

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 …

Fig. 1 shows the effect of silane coupling agent amount on the contact angle. As shown in Fig. 1, the SiC particles before modification can be considered as hydrophilic due to a water contact angle of 0°, and the hydrophobicity has improved obviously in different degrees after modification by KH550 and KH590.It can be clearly observed that …

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. …

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 …

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 …

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 ...

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 …

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 …

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 ...

[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 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.

Semantic Scholar extracted view of "Improving silica fume cement by using silane" by Yunsheng Xu et al.

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 …

Dispersing silica fume in cementitious materials by silane copolymerized polycarboxylate Superplasticizer: On the role of dispersion effectiveness as a function of …

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}, …

🕑 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 …

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 ...

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 …