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Study on the Durability of Concrete Lining by Using Early

Study on the Durability of Concrete Lining by Using Early

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

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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

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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

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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

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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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The early-age prediction of concrete strength using ...

Jan 05, 2021  This paper delivers a review of the prediction methods of the early-age strength of concrete. This study paper articulates the findings derived from work on the principles that govern numerous conventional methods of maturity used to forecast concrete's in-place strength. It is divulged that if the rise in temperature of the concrete after the process of blending is not any more than a ...

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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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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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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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Where Are We Now with Sprayed Concrete Lining in Tunnels?

fication of durable sprayed concrete constituents ensure that the lining will retain its strength and durability properties in the long term and so all but a small thickness of the primary lining is load bearing throughout the design life of the structure. The initial layer of 75 mm (3 in.), which is sprayed

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Magazine of Concrete Research Ahead of Print

Sep 01, 2021  Study on dynamic multi-axial tension-compression properties of different types of concrete. ... Early age activation of slag concrete for applications in hollowcore slabs. Chaaruchandra Korde, ... A laboratory test on the effect of bugholes on surface degradation of tunnel lining concrete subject to freeze–thaw cycles.

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Experimental Study on Nano-SiO2 Improving Concrete ...

Feb 14, 2019  Abstract. In order to reduce early damage of bridge deck pavement concrete in cold regions, a certain content of nano-SiO 2 is added into the concrete to enhance its durability. Through tests on four durability indexes, strength, frost resistance, resistance to Cl − ion permeability, and abrasion resistance of concrete with 1% nano-SiO 2 content and concrete without nano-SiO 2, the

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

Macrofibres delay early age cracking and reduce its openings. • Cracking patterns are different because macrofibres tend to distribute crack. • Early age cracking of massive concrete tunnel lining is mainly due to thermal shrinkage. • Cracking pattern is highly dependent on the types of fibres, on creep and on tunnel lining design.

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1 and Moncef L. Nehdi 2,

May 03, 2021  Various previous studies have explored the structural and durability performance of PCTL segments. For instance, Abbas et al. (2014) [23,30,31] studied the structural and durability performance of full-scale precast steel rebar reinforced concrete (RC) and steel fiber-reinforced concrete (SFRC) tunnel lining segments. It was observed that the

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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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Storm sewer rehabilitation using shotcrete lining ...

Aug 09, 2021  Condition monitoring of the concrete lining over the coming years will be carried out to verify the durability of the shotcrete lining. Jonathan Knoyle, P.Eng., is an Associate of R.V. Anderson Associates Limited in Ottawa and was Project Engineer on the St Joseph Boulevard Storm Sewer Rehabilitation project.

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Segmental Concrete Liners - Colorado School of Mines

Jon Hurt. Colorado School of Mines. 9/14/2016. Precast segmental liner design and construction for some of the world’s most challenging tunnels. Useful General References:\爀㄀⸀ 䄀䘀吀䔀匀 䜀甀椀搀攀氀椀渀攀猀 ⴀ 栀琀琀瀀㨀⼀⼀眀眀眀⸀愀昀琀攀猀⸀愀猀猀漀⸀昀爀⼀ ⴀ†ᰀ吀栀攀 搀攀猀椀最渀Ⰰ 猀椀稀椀渀最

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

Macrofibres delay early age cracking and reduce its openings. • Cracking patterns are different because macrofibres tend to distribute crack. • Early age cracking of massive concrete tunnel lining is mainly due to thermal shrinkage. • Cracking pattern is highly dependent on the types of fibres, on creep and on tunnel lining design.

get price

Segmental Concrete Liners - Colorado School of Mines

Jon Hurt. Colorado School of Mines. 9/14/2016. Precast segmental liner design and construction for some of the world’s most challenging tunnels. Useful General References:\爀㄀⸀ 䄀䘀吀䔀匀 䜀甀椀搀攀氀椀渀攀猀 ⴀ 栀琀琀瀀㨀⼀⼀眀眀眀⸀愀昀琀攀猀⸀愀猀猀漀⸀昀爀⼀ ⴀ†ᰀ吀栀攀 搀攀猀椀最渀Ⰰ 猀椀稀椀渀最

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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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Effect of Curing Temperature on the Durability of Concrete ...

Jun 22, 2017  To determine the durability of concrete in the actual temperature and humidity of the tunnel environment, this study investigates the mechanical properties, permeability of chloride ion, relative dynamic elastic modulus, and mass loss ratio of concrete specimens cured in the temperature which varied from normal, 40, 60, 75, and 90°C, and the humidity was kept at 90#x25; continuously.

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Where Are We Now with Sprayed Concrete Lining in Tunnels?

fication of durable sprayed concrete constituents ensure that the lining will retain its strength and durability properties in the long term and so all but a small thickness of the primary lining is load bearing throughout the design life of the structure. The initial layer of 75 mm (3 in.), which is sprayed

get price

Design of Sprayed Concrete Linings in Soft Ground─ A ...

Mar 11, 2014  The use of Sprayed Concrete Lining is an established method of soft ground tunnelling using sprayed concrete to support the excavation both temporarily and permanently. Compared with other tunnelling methods, such as using a Tunnel Boring Machine (TBM), the biggest advantage of the SCL technique is it allows tunnels and junctions to be built at ...

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Durability Studies on the Recycled Aggregate Concrete in ...

Jul 28, 2019  Since China hosted the Olympic Games in 2008, a mass of construction and demolition (CD) wastes were produced with the rapid urbanization construction. Recycling the CD waste into recycled aggregates (RA) is an effective method for reducing the amount of CD wastes. Many studies on the properties of RA and the durability of recycled aggregate concrete (RAC) were conducted in

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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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Fiber-Reinforced Shotcrete—Applications and Testing Overview

In the modern era, the first scientific studies on the use of steel fibers to reinforce concrete date back to the 1960s and 1970s.1,2 The use of steel fiber-reinforced shotcrete (FRS) was first introduced in the 1970s.3 The first docu-mented use of FRS was in 1973 by the U.S. Army Corps of Engineers in a tunnel adit project at the Ryrie Reservoir

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Thermal Cracking of Concrete [a detailed study ...

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

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Mechanical Behavior of Ultrahigh-Performance Concrete ...

Ultrahigh-performance concrete (UHPC) is a novel material demonstrating superior mechanical, durability and sustainability performance. However, its implementation in massive structures is hampered by its high initial cost and the lack of stakeholders’ ...

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Concrete 2021 Detailed Program 27Aug - ciaconference.au

A Study On Aggregate Selection For Fire Resistance Concrete For Tunnel Lining Mr Sarvesh MALI A Case Study On Temperature (peak And Differential) Monitoring For Potential early Age Concrete Cracking Mr Sarvesh MALI Bibliometric Review Of Machine Learning Use To Predict The Compressive Strength Of Concrete Formulations. Miss Jessica Fall CHAVES ...

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T. Yokoyama, Y. Uno, T. Saito, S. Date:Study on the durability of concrete lining using early-strength agent,International Journal of Engineering and Technology, Vol.9, No.3, 2017.6 I.Irfan,H.Tobo,Y.Ta,S.Date:Study on the Utilization of Innovative Air-cooled Slag Aggregates in Precast Concrete,International Journal of Structural ...

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The durability of shotcrete in cold region tunnel: A ...

Oct 10, 2018  The durability of shotcrete in the construction of tunnels in cold regions must be improved in order to improve stability and safety. The main factors that affected the frost resistance of the shotcrete is the temperature condition, the hydrological condition, and

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