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effects of sand and silica fume on the vibration damping

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Effects of sand and silica fume on the vibration damping ...

01/10/1998  The positive effect of silica fume is due to the large contribution of the interface between silica fume (much smaller in particle size than sand) and cement paste to the damping capacity. The storage modulus (Table 2) was decreased by the addition of sand, but was restored by the further addition of silica fume.

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Effects of sand and silica fume on the vibration damping ...

The addition of sand to cement paste was found to degrade the vibration damping ability, as shown by decreases in both loss tangent and storage modulus under flexure. However, further addition of silica fume more than restored the vibration damping ability, due to the silica fume causing increases in both loss tangent and storage modulus. Silica fume increased the loss modulus of mortar by as ...

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PII S0008-8846(98)00104-5 COMMUNICATIONS

EFFECTS OF SAND AND SILICA FUME ON THE VIBRATION DAMPING BEHAVIOR OF CEMENT Y. Wang and D.D.L. Chung 1 Composite Materials Research Laboratory, State University of New York at Buffalo, Buffalo, NY 14260-4400, USA (Received February 6, 1998; in final form June 26, 1998) ABSTRACT The addition of sand to cement paste was found to degrade the vibration damping

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Effects of sand and silica fume on the vibration damping ...

The addition of sand to cement paste was found to degrade the vibration damping ability, as shown by decreases in both loss tangent and storage modulus under flexure. However, further addition of silica fume more than restored the vibration damping ability, due to the silica fume causing increases in both loss tangent and storage modulus.

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Effect of carbon fibers on the vibration-reduction ability ...

01/07/1999  Admixtures such as silica fume, latex, and methylcellulose are known to improve the vibration-reduction ability of cement paste through increases in both loss tangent (damping capacity) and storage modulus (stiffness), as measured under dynamic flexure .The addition of sand is known to degrade the vibration-reduction ability of cement paste through decreases in both loss tangent and

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Enhancing the vibration reduction ability of concrete by ...

01/02/2000  The effect in the silica fume case is due to the large area of the interface (however diffuse) ... Effects of sand and silica fume on the vibration damping behavior of cement. Cem Concr Res, 28 (10) (1998), pp. 1353-1356. Article Download PDF View Record in Scopus Google Scholar. 4. J. Hou, X. Fu, D.D.L. Chung. Improving both bond strength and corrosion resistance of steel rebar in concrete by ...

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10.1016/S0008-8846(98)00104-5 DeepDyve

11/06/2020  A systematic study involving cement pastes has shown that surface-treated silica fume and latex are particularly effective for enhancing the damping capacity (3,4) , such that silica fume has the additional ability to greatly enhance the storage modulus. A high damping capacity and a high storage modulus are both desired for vibration reduction. The product of these two quantities is the loss ...

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(PDF) Improving the vibration damping capacity of

The use of acid treated silica fume (15% by weight of cement), latex (20 - 30% by weight of cement) or methylcellulose (0.4 - 0.8% by weight of cement) as an admixture gave the vibration damping ...

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University of Birmingham Benefit of damping in structural ...

10wt% of silica fume due to the large interface area between silica fume particles and cement matrix which can better dissipate vibration energy. In this study, SFRC-425-10 was the concrete mix which has the highest damping ratio (0.04128 and 0.04038 at 7 and

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Effect of Stress Amplitude on the Damping of Recycled ...

Every component has a significant effect on the damping of concrete. Many studies have focused on the influence of admixtures on the damping of concrete; however, few studies have investigated the influence of coarse aggregate, especially recycled coarse aggregate (RCA). Chung et al. [1,2,3,4] studied the damping capacity and storage modulus of cement paste and mortar with silica fume, latex ...

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Dynamic and seismic property experiments of high

The loss tangent and storage modulus of cement mortar containing treated silica fume and styrene-acrylic are measured. Shaking table tests on three groups of 1/4 models of high damping concrete frames are conducted to compare the effects of reducing vibration. A relationship between the viscosity coefficient of high damping concrete and the damping coefficient of structure is established by ...

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Retracted: Micromechanical Evaluation of the Damping ...

12/12/2012  A common industrial byproduct material—silica fume that showed certain antishock potential when mixed with concretes—was modified with silane in this study toward improved capabilities in both stiffness and damping. To evaluate the effectiveness of the modified silica fume (MSF), a series of dynamic flexural tests and numerical analyses were conducted, of which the results are presented.

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Effects of Silica Fume Addition on Properties of Fresh ...

Effects of Waste Soda-Lime Glass Sand and Glass Fiber on Physical and Mechanical Properties of None-Autoclaved Aerated Concrete ... the effect of adding silica fume on the workability of mortar was investigated by evaluating its fresh properties, plastic viscosity, and vibration propagation characteristics. Changes to mortar’s fresh properties due to pressure were also investigated to ...

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Enhancement of Dynamic Damping in Eco-Friendly Railway ...

The addition of 10% silica fume improved slightly the concrete’s damping ratio to reach 0.02822 using ECFM and 0.2791 using LDM, and a little more improvement of 19 and 21% respectively when 10% of 75 micron rubber has been added.

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PII S0008-8846(98)00017-9 X. Li and D.D.L. Chung

received silica fume together with methylcellulose, which is in turn higher than that for cement paste containing latex (12). Hence, surface-treated silica fume is more effective than latex for vibration damping. The high static tensile modulus attained by using surface-treated silica fume is consistent with the high dynamic flexural storage ...

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混凝土材料粘滞系数的测试技术及试验研究-【维普期刊官网】- 中

Investigation of vibration damping on polymer concrete with polyester resin [J]. Cem Concr Res, 2000,30:171-174. 被引量:1; 10 [8]WANG Y, CHUNG D D L. Effects of sand and silica fume on the vibration damping behavior of cement [J]. Cem Concr Res, 1996, 28:1 353-1 356.

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University of Birmingham Benefit of damping in structural ...

10wt% of silica fume due to the large interface area between silica fume particles and cement matrix which can better dissipate vibration energy. In this study, SFRC-425-10 was the concrete mix which has the highest damping ratio (0.04128 and 0.04038 at 7 and

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FT26 - 09/ 1 Can vibration be controlled with damped concrete?

treatment on damping, using sand-sized particles (ground-up rubber tires), ... carbon fibers, and silica fume,2 but their measurements were limited to frequencies below 2 Hz. Wu (1995) examined the effects of steel fibers.ects of steel fibers. CLEANROOM FT26 - 09/ 1 SEMICONDUCTOR FABTECH – 26TH EDITION 1 ABSTRACT Vibration has long been recognized as a contaminant in a fab. The vibrations ...

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Enhancement of Dynamic Damping in Eco-Friendly Railway ...

The addition of 10% silica fume improved slightly the concrete’s damping ratio to reach 0.02822 using ECFM and 0.2791 using LDM, and a little more improvement of 19 and 21% respectively when 10% of 75 micron rubber has been added.

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Retracted: Micromechanical Evaluation of the Damping ...

12/12/2012  A common industrial byproduct material—silica fume that showed certain antishock potential when mixed with concretes—was modified with silane in this study toward improved capabilities in both stiffness and damping. To evaluate the effectiveness of the modified silica fume (MSF), a series of dynamic flexural tests and numerical analyses were conducted, of which the results are presented.

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PII S0008-8846(98)00017-9 X. Li and D.D.L. Chung

received silica fume together with methylcellulose, which is in turn higher than that for cement paste containing latex (12). Hence, surface-treated silica fume is more effective than latex for vibration damping. The high static tensile modulus attained by using surface-treated silica fume is consistent with the high dynamic flexural storage ...

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Effects of silica fume, latex, methylcellulose, and carbon ...

The fibers increased the specific heat due to the contribution of the fiber-matrix interface to vibration.}, doi = {10.1016/S0008 -8846(97 ... Cement mortars were prepared with a different sand-to-cement ratio and fineness of sand. A study on the effect of silica fume on corrosion resistance of cement paste and mortars to acid solutions is also presented. The progress of corrosion was ...

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Effect of Fly Ash and Silica Fume on Compressive Strength ...

Effect of Fly Ash and Silica Fume on Compressive Strength, Sorptivity and Carbonation of SCC Kazim Turk*, ... Natural sand with a fineness modulus of 3.05 and gravel with a nominal maximum size of 20 mm were used as the aggregates for all mixture. The relative density values for 0-7, 7-15 and 15-20 mm were 2.63, 2.64 and 2.66 g/cm3, and absorption rates were 1.57%, 1.0% and 0.7%, respectively ...

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Preliminary study of Self Compacting Concrete by adding ...

Preliminary study of Self Compacting Concrete by adding Silica Fume- A review paper Shobana K.S1 ... Silica fume is pozzolanic, because it is reactive, like volcanic ash. Its effects are related to the strength, modulus, ductility, sound absorption, vibration damping capacity, abrasion resistance, air void content, bonding strength with reinforcing steel, shrinkage, permeability, chemical ...

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(PDF) Effect of Incorporating Silica Fume in Fly Ash ...

Incorporation of silica fume into fly ash can be expected to improve the properties of resulting geopolymers in terms of strength and porosity.The objective of the experimental investigation was to study the effect of addition of silica fume on physico-mechanical properties and durability of fly ash based geopolymer composites. Up to 5% silica fume by weight was added in increments to the fly ...

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混凝土材料粘滞系数的测试技术及试验研究-【维普期刊官网】- 中

Investigation of vibration damping on polymer concrete with polyester resin [J]. Cem Concr Res, 2000,30:171-174. 被引量:1; 10 [8]WANG Y, CHUNG D D L. Effects of sand and silica fume on the vibration damping behavior of cement [J]. Cem Concr Res, 1996, 28:1 353-1 356.

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