Comparison between the performance of expansive SCC and expansive conventional concretes in different expansion and curing conditions

Calvo, José Luis García; Revuelta, D.; Carballosa, Pedro; Gutiérrez, Jesús Villa

doi:10.1016/j.conbuildmat.2017.01.039

Cited by 41 publications

(16 citation statements)

References 29 publications

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“…In addition, the long-term underwater curing is helpful to the bond strength development of AWC. In the experiments carried out by García Calvo [33], the expansion of specimens via a 28d underwater curing at 20 ± 2 °C was more than 0.15%, while that value of specimens cured in the air during the same time and temperature was less than −0.01%. Furthermore, the status of “triaxial compression” can be produced by placing a steel or FRP tube outside the expanding AWC.…”

Section: Introductionmentioning

confidence: 99%

The Mix Ratio Study of Self-Stressed Anti-Washout Underwater Concrete Used in Nondrainage Strengthening

Jiang

Shen

et al. 2019

Materials

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Anti-washout underwater concrete (AWC) is widely used in nondrainage strengthening; however, there still exist some problems with it, such as high strength loss and poor interfacial bond in practical engineering application. Based on the study of self-stressed concrete (SSC), a research on the mix ratio for the C30 self-stressed anti-washout underwater concrete (SSAWC) was carried out in this paper in hope of solving the above problems, specifically, by adding an expansive agent to the AWC. The parameters, such as strength, fluidity, anti-dispersity, and expansibility, were picked as target indices in determination of the mix ratio. The orthogonal test design and range analysis were used to determine the reasonable mix ratio and study the influence of various parameters on the performance of SSAWC. The experimental program conducted includes a series of strength, fluidity, anti-dispersity, and expansibility tests on 18 groups of specimens. The results show that C30 SSAWC has an excellent performance using the optimal mix ratio. Compared with AWC, the expansibility and self-stress of the SSAWC can be easily observed, and the compressive strength ratio of the SSAWC casted in water to that casted in air is much bigger. This implies that SSAWC is applicable to the nondrainage strengthening.

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Section: Introductionmentioning

confidence: 99%

The Mix Ratio Study of Self-Stressed Anti-Washout Underwater Concrete Used in Nondrainage Strengthening

Jiang

Shen

et al. 2019

Materials

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“…In this formula, f b is flexural strength of mortar (MPa), P is the loading pressure, L is the gap between supporting points, and b and h are the width and height of specimen section (mm), respectively [17].…”

Section: Flexural Strength Testmentioning

confidence: 99%

The Workability and Crack Resistance of Natural and Recycled Aggregate Mortar Based on Expansion Agent through an Environmental Study

Jun-fang

Liao

et al. 2021

Sustainability

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Greenhouse gas emission has been a serious problem for decades. Due to the high energy consumption of traditional construction and building materials, recycled aggregate and other environmentally-friendly materials or recycled materials have been researched and applied. The treatment and reuse of construction and demolition waste (CDW) is a good way to reasonably distribute the renewable resources in the urban city. The recycled aggregate can be used in road engineering, geotechnical engineering and structural engineering. The combined use of natural aggregate and recycled aggregate may possess better performance in real constructions. This paper investigates the mechanical performance, micro-mechanism and CO2 footprint assessment of NAM (natural aggregate mortar) and RAM (recycled aggregate mortar). Compressive strength test, flexural strength test, XRD and SEM, and CO2 emission evaluation were conducted and analyzed. The results indicate that NAM depicts better compressive strength performance and RAM has higher flexural strength. The XRD and SEM patterns illustrate that the ettringite and C-S-H are the most important role in shrinkage-compensating mechanism, which is more obvious in RAM specimens. The proportion of CaO and MgO hydrated into Ca(OH)2 and Mg(OH)2 is also a key point of the volume expansion through the curing period. Finally, the CO2 emission of NA is higher than RA per unit. This indicates that utilizing recycled aggregate over other conventional resources will reduce the energy consumption, and hit the mark to be environmental-friendly.

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“…The magnitude and rate of the expansion can be conditioned by changes in the concrete raw materials. To guarantee the homogeneity of the mixtures during the mix design and to ensure that the expansion was only conditioned by the added proportion of expansive agent and by the curing conditions [25,26] the origin and nature of the raw materials were not changed.…”

Section: Materials and MIX Proportionsmentioning

confidence: 99%

Design of filling self-stressing concrete to use in strengthening of columns by prefabricated jacketing

Carballosa

Revuelta

Fernandez-Escandón

2020

Construction and Building Materials

Self Cite

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h i g h l i g h t s A design and characterization of an self-stressing SCC is offered. An improved alternative for the reinforcement of pillars by confinement is proposed. Turning the reinforcement action from passive to active from casting is proved. A double-ring test device determine effectively the expansion of the concrete. The double-ring device eliminates the dependence of the setting time from ASTM C878.

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Comparison between the performance of expansive SCC and expansive conventional concretes in different expansion and curing conditions

Cited by 41 publications

References 29 publications

The Mix Ratio Study of Self-Stressed Anti-Washout Underwater Concrete Used in Nondrainage Strengthening

The Mix Ratio Study of Self-Stressed Anti-Washout Underwater Concrete Used in Nondrainage Strengthening

The Workability and Crack Resistance of Natural and Recycled Aggregate Mortar Based on Expansion Agent through an Environmental Study

Design of filling self-stressing concrete to use in strengthening of columns by prefabricated jacketing

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