ASSESSING THE CONDITION AND REPAIR ALTERNATIVES OF …

BUILDING CONSTRUCTION INFORMATION FROM THE CONCRETE AND MASONRY INDUSIRIES August 1994 ASSESSING THE CONDITION AND REPAIR AND MASONRY MEMBERS ALTERNATIVES OF FIRE-EXPOSED CONCRETE After a building fire, concrete and masonry members may be all that remains. An accurate assessment of the damage is essential to the restoration process INTRODUCTION

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What are the Factors Affecting Workability of Concrete?

The workability of concrete is reduced and increased based on the quantity of silica fume. The use of silica fume in concrete can improves workability when used at low replacement rates, but can reduce workability when added at higher replacement rates. Silica fume are used as pumping aid for concrete when used as 2 to 3% by mass of cement.

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Studying the Printability of Fresh Concrete for Formwork

Jan 01, 2019 · The pumpability of concrete depends highly on its composition. Since even a slight variation in the mix design can have a pronounced impact on the behavior of fresh concrete, it is difficult to establish quantitative links between the compositions of the …

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CN102128760A - Method for testing pumpability of concrete

The invention relates to a method for testing the pumpability of a concrete mixture, which comprises the following steps: 1) testing and calculating the total content of mortar in concrete and the density of the mortar; 2) calculating the content of the mortar filled in pebble gaps; 3) calculating the mass of the residual filled mortar by subtracting the mass of the mortar filled in pebble

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Table 6 from Assessing the pumpability of concrete with

What Makes Concrete Pumpable?| Concrete Construction Magazine

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(PDF) Environmental Impact of Concrete - ResearchGate

Oct 20, 2009 · The use of concrete represents about 65% of all the building materials in the world [4]. This leads to overproduction of cement that results to environmental issues such as water pollution [5

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Concrete Pumpability Factors | Pumpable Concrete Factors

Aug 16, 2021 · Pumpable concrete is a type of concrete that can be transported to a great height via pipes and is utilised when a large amount of concrete needs to be laid.. Several factors affect the pumpability of concrete, including cementitious materials, aggregate properties, admixtures, and batching and mixing of concrete ingredients.

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Pumping Concrete: A Fundamental and Practical Approach

The pumpability of concrete can be described by the consistency and the cohesiveness of this mix. The consistency is the relative ability to flow and in China this is measured by the slump test. The cohesiveness is the resistance to segregation and bleeding.

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bs en 1008-2002 mixing water for concrete — specification

When assessing the suitability of water of unknown quality for the production of concrete, both the composition of the water and the application of the concrete to be produced should be considered. 1 Scope This European Standard specifies the requirements for water that is suitable for making concrete that conforms to

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THE PUMPABILITY AND CHANGING QUALITY OF CONCRETES …

As a result, it was concluded that the comparative assessment of concrete pumpability according the type of concrete may be possible by using the compact pumpability test apparatus when the change in concrete quality before and after pumping and the pressures in the pipes are measured.

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State of the Art on Prediction of Concrete Pumping

on qualitative assessment of concrete pumpability based on the slump test or the slump flow test. However, for major construction sites requiring long-distance transport of con-crete, such as high-rise buildings, long-span bridges, long-distance tunnels and others, priori prediction of concrete pumpabilitygrowinginimportance

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Assessment and prediction of concrete flow and pumping

Self Consolidating Concrete (SCC) — What, why, & how

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562-19: Code Requirements for Assessment, Repair, and

1.1.1 ACI 562, "Code Requirements for Assessment, Repair, and Rehabilitation of Existing Concrete Structures," is hereafter referred to as "this Code." 1.1.2 Scope—This code shall apply to assessment, repair, and rehabilitation of existing concrete structures as: 1. A code supplementing the International Existing Building Code (IEBC) 2.

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WHAT ARE THE FACTORS AFFECTING WORKABILITY OF CONCRETE

Apr 04, 2014 · A concrete is said to be workable if it is easily transported, placed, compacted and finished without any segregation. Workability is a property of freshly mixed concrete, and a concrete is a mixture of cement, aggregate, water & admixture. Due to this all the properties of concrete, whether in fresh state or hardened state, is affected by

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RILEM - Publications

Analogously, the approaches for the assessment of fresh concrete workability in general and its pumpability in particular, have to be updated as well. Indeed, full-scale pumping tests cannot always be performed for any construction project to ensure the suitability of the material properties. Instead, it is desired to proceed with a series

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What Makes Concrete Pumpable?| Concrete Construction Magazine

The pumpability of concrete is not an easy concept to define and requires the introduction of notions such as stability and mobility under pressure to do so. In general, concrete pumpability is defined as the capacity of a concrete under pressure to be mobilized while maintaining its …

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Analysing the Suitability of C16/20-X0v(H)-24-F3 Concrete

The current paper introduces a case study dealing with the problem of pumpability of the ready-mix concrete of grade of C16/20-X0v (H)-24-F3 []. During solving a practical industrial problem we have worked out a modified composition of the related concrete material in order to improve the pumpability. After describing some possible theoretical and practical methods the authors give suggestion

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Research Article Predicting Pumpability and Shootability

assessing the pumpability and shootability of mixtures with natural aggregate sources such as river gravel. In recognition of the issues, this paper contributes to providing a sim-ple empirical methodology to predict the pumpability and shootability of WMS containing crushed aggregate obtained from tunnel excavation and di erent type and dosage of

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State of the Art on Prediction of Concrete Pumping

Jun 16, 2016 · In many construction sites, the use of pumping is determined based on the workers' experience and on qualitative assessment of concrete pumpability based on the slump test or the slump flow test. However, for major construction sites requiring long-distance transport of concrete, such as high-rise buildings, long-span bridges, long-distance

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PROPOSING A SIMPLE METHOD FOR ASSESSING CONCRETE …

1 PROPOSING A SIMPLE METHOD FOR ASSESSING CONCRETE PUMPABILITY Y. YAMADA1†, S. HASHIMOTO2 *, Y. EMOTO3 and H. HAZEHARA2 1Graduate School of Civil Engineering, Fukuoka University, Japan 2Assistant professor, Department of Civil Engineering, Fukuoka University, Japan 3Professor, Department of Civil Engineering, Fukuoka University, Japan ABSTRACT As a method for easily assessing concrete

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