Study on the Durability of Concrete Lining by Using Early

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Study on the Durability of Concrete Lining by Using Early ...

high-early-strength agent was used for a part section of lining concrete, NATM and compressive strength test and gas permeability test (torrent) were carried out using material age for 28 days as a target with a selection with other standard Study on the Durability of Concrete Lining by Using Early-Strength Agent . T. Yokoyama, Y. Uno, S ...

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Study on the Durability of Concrete Lining by Using Early ...

PDF On Jan 1, 2017, T. Yokoyama and others published Study on the Durability of Concrete Lining by Using Early-Strength Agent Find, read and cite all the research you need on ResearchGate

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Study on the Durability of Concrete Lining by Using Early ...

Feb 17, 2021 News!Vol. 10 Vol. 11 has been indexed by INSPEC! May 28, 2021 News!Vol.13, No. 2 has been published with online version. Feb 08, 2017 News!

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No. 40 2015 -E Jll a A 1 -5 11 -17 -- 23 - 29 - 33 - 39 49 ...

Study on the durability of concrete lining by using early-strength agent Health survey of concrete structures by Non Contact Acoustic Imaging Method(5) -The Application of a strong ultrasonic sound source- Study on the measurement method ofelectric resistance using

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(PDF) Productivity Improvement of the Concrete ...

Study on the Durability of Concrete Lining by Using Early-Strength Agent. Article. Full-text available. Jan 2017 ... there have been few studies on numerical analysis methods for evaluating such ...

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No. 40 2015 -E Jll a A 1 -5 11 -17 -- 23 - 29 - 33 - 39 49 ...

Study on the durability of concrete lining by using early-strength agent Health survey of concrete structures by Non Contact Acoustic Imaging Method(5) -The Application of a strong ultrasonic sound source- Study on the measurement method ofelectric resistance using

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(PDF) Effect of fibres on early age cracking of concrete ...

Effect of fibres on early age cracking of concrete tunnel lining. ... high cement dosage may reduce the mechanical and durability performance of RPC. This study aims to clarify the influence of ...

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Effect of fibres on early age cracking of concrete tunnel ...

Oct 01, 2016  1. Introduction. In massive concrete structures, cracking can occur at early-age due to strains generated by both internal and external restraints (i.e. during the period of time which starts when the concrete sets and can last several days depending on the thermal conditions of concrete

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Experimental study on durability of shotcrete and concrete ...

Experimental study on durability of shotcrete and concrete lining under hot spring and geothermal environments Chia Han Lee 1,2 T ai Tien Wang 2 Fu Shu Jeng 3 Tsan Hwei Huang 3

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Study of Use, Durability, and Cost of Corrugated Steel ...

much less durable than /reinforced concrete pipe (RCPJ . Current field reports indicate CSP is being replaced as early as 20 years of age due to rusting out of the lower portion of the flowline (invert). It is recognized that CSP has a lower initial installed cost than Rep.

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Methodology for Quantifying Features of Early-Age Concrete ...

Jul 07, 2021  Quantifying the features of concrete cracking is of significance for assessing the bearing capacity and durability of concrete structures. However, there is a lack of efficient and reliable observation and description of the crack features, particularly for very early-age concrete.

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An Experimental Study on Durability of Concrete Using Fly ...

In this study, an attempt has been made to study the durability of concrete using the mineral admixtures like Fly Ash Ground Granulated Blast Furnace Slag (GGBS) for M30 grade concrete.Cube Specimens were casted and are immersed in normal water, sea water, H2SO4 of various concentrations and were tested after 7 days, 28 days 60 days.

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Concrete Slab Surface Defects: Causes, Prevention, Repair

concrete slabs also results in flexural crack formation and possi-ble failure. Cracking in concrete can be reduced significantly or eliminated by observing the following practices: 1. Use proper subgrade preparation, including uniform support and proper subbase material at adequate moisture content. 2.

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Development of Secant Pile Retaining Wall Construction in ...

700m of wall to form cut and cover tunnel using 900mm diameter bored piles Base slab connection detail using box-out and couplers The key lessons learnt relating to the low strength concrete mix from the above projects is that the low early strength is not a normal requirement / target for ready mix concrete suppliers. Early

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Mechanical properties, permeability and durability of ...

cance to research the durability of shotcrete single lining structure. Nowadays, the durability of normal concrete have been investi-gated widely and deeply [15,16]. However, be due to add ...

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Experimental Study on Durability of Hybrid Fiber ...

This article proposes hybrid fiber-reinforced concrete (HFRC) mixed with polyvinyl alcohol fiber (PVA) and polypropylene steel fiber (FST) as a wall construction material to improve the bearing capacity and durability of frozen shaft lining structures in deep alluvium. According to the stress characteristics and engineering environment of the frozen shaft lining, the strength, impermeability ...

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Best Practices of Using Shotcrete for Wall Fascia and ...

comparison with CIP concrete, the “before shooting” shotcrete mixture studied in Phase I exhibits better early age shrinkage resistance as well as long-term freeze-thaw resistance. The Phase II study will be conducted for evaluating “after shooting” shotcrete and their early age shrinkage and long term durability performance. 17.

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Possibilities of Using Pumice Concrete as Thermal ...

This paper deals with the possibility of using pumice concrete as thermal insulation lining of industrial chimneys. Two formulas were prepared, the first from sulphate resistant cement and the second as a reference mixture from Cem I 42.5R. The thermal insulating properties of the prepared recipes will be evaluated as well as the resistance to the action of sulphates in 5 % sodium sulphate ...

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Thermal Cracking of Concrete [a detailed study ...

Jan 04, 2020  Early thermal cracking occurs due to the excessive tensile strains in the concrete than its capacity, and tensile strains are developed due to the thermal contractions or with the variation of temperature within a section. The development of the thermal cracking of concrete could be extended up to two to three weeks.

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Study on Improvement of Early Strength of Highly Durable ...

Study on Improvement of Early Strength of Highly Durable Concrete by Combined Use of Chemical Admixtures . Sora Suto and Kazuhito Niwase . National Institute of Technology Hachinohe College, Aomori Hachinohe, Japan . Email: [email protected], [email protected] . Abstract—At present, in Japan, the deterioration of social

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Methodology for Quantifying Features of Early-Age Concrete ...

Jul 07, 2021  Quantifying the features of concrete cracking is of significance for assessing the bearing capacity and durability of concrete structures. However, there is a lack of efficient and reliable observation and description of the crack features, particularly for very early-age concrete.

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Experimental Study on Early-Age Crack of Mass Concrete ...

Thermal deformation under restrained conditions often leads to early-age cracking and durability problems in mass concrete structures. It is crucial to monitor accurately the evolution of temperature and thermal stresses. In this paper, experimental studies using temperature stress testing machine (TSTM) are carried out to monitor the generated thermal cracking in mass concrete.

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Shotcrete: early strength and re-entry revisited practices ...

early strength development via the use of a purpose-designed, low-pulsation sprayed concrete pump; unique, state-of-the-art admixture technology; and a recent study result which suggests that macro-synthetic fibre reinforcement can offer an advantage over steel fibre in early age shotcrete toughness.

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Geopolymer concrete for durable linings

Construction of two water tanks of 10m diameter x 2.4m high in March 2011 was part of a study to assess the water resistant properties of EFC and investigate the autogenous healing behaviour of geopolymer concrete. One tank was built using a Grade 32MPa concrete with a maximum aggregate size of 10mm with blended cement consisting of 80% ...

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CONCREEP 10 : Mechanics and Physics of Creep, Shrinkage ...

Study on the Prediction of the Behavior of Shrinkage with a Volume Change of Concrete in an Early Age Thermal Crack Estimation of Dam Concrete Considering the Influence of Autogenous Shrinkage Serviceability and Stability of Unreinforced Mass Concrete Structures EC 2-Compatible Design Concepts Derived from Comprehensive FE Studies on Real ...

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Concrete Slab Surface Defects: Causes, Prevention, Repair

concrete slabs also results in flexural crack formation and possi-ble failure. Cracking in concrete can be reduced significantly or eliminated by observing the following practices: 1. Use proper subgrade preparation, including uniform support and proper subbase material at adequate moisture content. 2.

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Thermal Cracking of Concrete [a detailed study ...

Jan 04, 2020  Early thermal cracking occurs due to the excessive tensile strains in the concrete than its capacity, and tensile strains are developed due to the thermal contractions or with the variation of temperature within a section. The development of the thermal cracking of concrete could be extended up to two to three weeks.

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Creep, Shrinkage and Durability Mechanics of Concrete and ...

CREEP, SHRINKAGE AND DURABILITY MECHANICS OF CONCRETE AND CONCRETE STRUCTURES contains the keynote lectures, technical reports and contributed papers presented at the Eighth International Conference on Creep, Shrinkage and Durability of Concrete and Concrete Structures (CONCREEP8, Ise-shima, Japan, 30 September - 2 October 2008). The topics covered

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Segmental lining design

1. Boring Mechanics drive a circular profile – Concrete segments typical; steel and cast iron now usually only adopted for special applications, e.g. cross -passage openings 2. Segmental linings typically installed as a single-pass lining system at the rear of the TBM.

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Research Activities: Akira HOSODA ynuconcretelab

Jan 29, 2020  Full Scale Thermal Stress Simulation of Multiple Span Steel Box Girder Bridge Evaluating Early Age Transverse Cracking Risk of Durable RC Deck Slab . 2017. Study on Time-Dependent Behavior of RC Beams with Flexural Cracks Generated at Early Age (Satoshi Komatsu and Akira Hosoda), Journal of Advanced Concrete Technology Vol.15, 368-380, August ...

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Is Concrete Canvas® really an environmentally friendly ...

Carbon emissions. CC offers significant carbon reductions compared to traditional concrete methods. As stated in Concrete Canvas Ltd.’s CO 2 Footprint Report, one square metre of Concrete Canvas used for channel lining will contain only 45% of the Embodied Carbon of an equivalent square metre of conventional poured concrete.. That 55% saving is further boosted when considering transportation.

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Paper: Shotcrete: early strength and re-entry revisited ...

Abstract: Shotcrete, a globally employed support system of choice in underground mining, is required to perform its support function not only over the expected life of underground openings, but also from a safety and productivity perspective, at a very early age. The balance between placement ability, early strength and longterm performance is a delicate one which has been repeatedly improved ...

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Experimental study on permeability evolution during ...

Jan 20, 2019  This paper presents an experimental study on shaft lining concrete specimens under different confining and pore pressure difference. The initial permeability, peak strength, relationship between the axial strain, volumetric strain and permeability; and the failure morphologies of the shaft lining concrete were investigated.

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