An experimental research on the fluidity and mechanical properties of high-strength lightweight self-compacting concrete

Choi, Yun Wang; Kim, Yong Jic; Shin, Hwa Cheol; Moon, Han-Young

doi:10.1016/j.cemconres.2004.11.003

Cited by 159 publications

(78 citation statements)

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“…They used natural coarse and fine aggregate using different replacement contents of aggregates by expanded polystyrene and using silica fume as a filler material, however there is no data available on the hardened properties of produced concrete. Choi et al [23] conducted research on fluidity and mechanical properties of high-strength lightweight self-compacting concrete. They used different proportion of natural coarse, natural fine, light-weight coarse and light-weight fine aggregate to produce concrete with density of above 2000 kg/m 3 , compressive strength of above 40MPa and slump flow of above 600mm but there is still no investigation on the flexural strength of concrete.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Iqbal¹,

Ali²,

Holschemacher³

et al. 2016

Period. Polytech. Civil Eng.

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IntroductionAs known, self-compacting concrete (SCC) is highly flowable, non-segregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcement without any mechanical consolidation. It doesn't require any vibration for compaction and can flow through narrow spaces without segregation and excessive bleeding [1]. Therefore SCC is one of the greatest innovations of concrete technology. It was introduced in construction industry in early 1990s. Similar to the normal vibrated concrete (NVC), SCC mixtures consist of aggregate, cement, water, admixtures and some mineral additions. Unlike NVC, SCC has high quantity of fillers (eg. silica fume, fly ash, limestone powder etc.) and superplasticizer (high-range water reducing admixture) added to improve its flowing property.As SCC flows under its own weight without or very little use of vibration, it results in saving a lot of labor effort and bring economy to the concreting. Moreover, it can also flow through narrow and complex geometries where the use of vibrator is almost impossible.Use of SCC in construction industry is getting more and more popularity all over the world because of inherited advantages and studies on its hardened properties. SCC can be classified mainly into 3 different types [2]:• powder type;• viscosity type and • combination type The first type has a high amount of powder (all material <0.15 mm) ranging from 550-650 kg/m 3 , which provides the plastic viscosity and thus resistance to segregation whereas the yield point is determined by the addition of suitable superplasticizers. In the second type there is less powder content ranging from 350-450 kg/m 3 . In this type additional minerals or fillers are not used for segregation resistance. An admixture called viscosity modifying agent (VMA) is used to control the segregation, while yield point is controlled by the superplasticizer. The third type has a powder content of 450-550 kg/m 3 , but additionally rheology is controlled by the use of appropriate dosage of VMA and superplasticizer.

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Section: Introductionmentioning

confidence: 99%

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Iqbal¹,

Ali²,

Holschemacher³

et al. 2016

Period. Polytech. Civil Eng.

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“…The mix design for the SCC followed that of our preceding works (Choi et al 2002(Choi et al , 2003(Choi et al , 2006(Choi et al , 2008. The aggregate filling ratio for determining the PF value, which is defined as the ratio of mass of aggregate in a tightly packed state in SCC to that in a loosely packed state (Su et al 2001), and flowcharts of the mix design procedure for SCC are shown in Figs.…”

Section: Materials and MIX Designmentioning

confidence: 99%

“…The aggregate filling ratio for determining the PF value, which is defined as the ratio of mass of aggregate in a tightly packed state in SCC to that in a loosely packed state (Su et al 2001), and flowcharts of the mix design procedure for SCC are shown in Figs. 1 and 2 of Choi et al (2006), respectively. Both NC and SCC specimens were designed for a moderately high-strength SCC of 50 MPa, and the mix proportions of the materials are given in Table 3.…”

Section: Materials and MIX Designmentioning

confidence: 99%

“…Thus, more systematical experiments and theoretical approaches on shear behavior and performance of the deep beam made with SCC should be made. In the present study, a series of experimental tests were carried out to evaluate fresh properties (e.g., flowability, segregation resistance and self compacting ability) of a moderately high-strength (high-flowing) SCC and to investigate the shear behavior and performance of deep beams made with SCC in our preceding work (Choi et al 2006). Fresh properties of the SCC were evaluated based on the slump flow and V-funnel and U-box tests, and hardened properties of the NC and SCC were measured from compressive strength tests.…”

Section: Introductionmentioning

confidence: 99%

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Shear Behavior and Performance of Deep Beams Made with Self-Compacting Concrete

Choi

Lee

Chu

et al. 2012

Int J Concr Struct Mater

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An experimental study was carried out to evaluate fresh properties of a moderately high-strength (high-flowing) selfcompacting concrete (SCC) and to investigate shear behavior and performance of deep beams made with SCC. Fresh and hardened properties of normal concrete (NC) and SCC were evaluated. The workability and compacting ability were observed based on casting time and number of surface cavities, respectively. Four-point loading tests on four deep beams (two made with SCC and two with NC) were then conducted to investigate their shear behavior and performance. Shear behavior and performance of beams having two different web reinforcements in shear were systematically investigated in terms of crack pattern, failure mode, and load-deflection response. It was found from the tests that the SCC specimen having a normal shear reinforcement condition exhibited a slightly higher load carrying capacity than the corresponding NC specimen, while the SCC specimen having congested shear reinforcement condition showed a similar load carrying capacity to the corresponding NC specimen. In addition, a comparative study between the present experimental results and theoretical results in accordance with ACI 318 (Building Code Requirements for Reinforced Concrete (ACI 318-89) and Commentary-ACI 318R-89, 1999), Hsu-Mau's explicit method (Hsu, Cem Concr Compos 20:419-435, 1998; Mau and Hsu, Struct J Am Concr Inst 86:516-523, 1989) and strut-and-tie model suggested by Uribe and Alcocer (2002) based on ACI 318 Appendix A (2008) was carried out to assess the applicability of the aforementioned methods to predict the shear strength of SCC specimens.

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“…Lightweight aggregates, such as expanded perlite and pumice, are often used in cement mortars or concretes in China and other counties in Asia and Middle East [1][2][3][4][5][6][7][8][9]. The lightweight inert cenospheres, produced in coal-fired power plants, are also ideal lightweight aggregates because of their hollow-sphere structures comprised largely of silica and alumina and filled with inert air and/or gases [10].…”

Section: Introductionmentioning

confidence: 99%

Sorption and Thermal Properties of Insulating Mortars with Expanded and Vitrified Small Ball

Mitchell¹,

Link²,

Fang

et al. 2011

Journal of Testing and Evaluation

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Sorption and thermal properties of insulating mortars with expanded and vitrified small ball (EVSB)Ping, F.; Mukhopadhyaya, P.; Kumaran, M. K.; Shi, C.http://www.nrc-cnrc.gc.ca/irc Sorpt ion a nd t he rm a l prope rt ie s of insula t ing m ort a rs w it h e x pa nde d a nd vit rifie d sm a ll ba ll (EV SB) NRCC-54004Ping, F.; Mukhopadhyaya, P.; Kumaran, M.K.; Shi, C. March 2011A version of this document is published in / Une version de ce document se trouve dans: Testing and Evaluation, 39, (2), pp. 1-32, March 01, 2011 The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42 ASTM Journal ofLes renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 Sorption and Thermal Properties of Insulating Mortars with Expanded and Vitrified Small Ball (EVSB)Ping Fang 1* , Phalguni Mukhopadhyaya 2 , Kumar Kumaran 2 , Caijun Shi 1 , ABSTRACT:Expanded vitrified small hollow ball (EVSB), made from a special type of perlite mineral is one of the recently developed materials in China. It is widely used as a cementitious thermal insulating mortar for building envelope construction in hot-humid areas of southern China. However, EVSB is a porous material sensitive to environmental moisture. The thermal insulating property of the EVSB mortar is dependent on its moisture transport and storage characteristics. In this study, hygroscopic sorption properties of EVSB mortars have been investigated, in comparison with those of normal expanded perlite particle (NEPP) mortars. The BET specific surface area and the BJH pore size distribution, as well as the SEM micro-morphologies of the mortars were assessed. It was observed that EVSB mortars had lower moisture sorption capacity than NEPP mortars when the relative humidity (RH) was higher than 70% because of its lower total pore volume. The addition of water-repellent admixtures in the mortar decreased the moisture sorption capacity of EVSB mortars but still maintains the same physisorption isothermal characteristics. It is also evident that the thermal conductivity values of both NEPP and EVSB mortars increased rapidly when RH is above 90%. However, the increase rate of thermal conductivity of NEPP mortars was apparently higher than that of EVSB mortars. It is hoped that finding from this study will help to develop a better understanding of the in-situ thermal performance of EVSB mortar used for the building envelope construction in...

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An experimental research on the fluidity and mechanical properties of high-strength lightweight self-compacting concrete

Cited by 159 publications

References 10 publications

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Shear Behavior and Performance of Deep Beams Made with Self-Compacting Concrete

Sorption and Thermal Properties of Insulating Mortars with Expanded and Vitrified Small Ball

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