workability and proportion design of pumping concrete
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workability and proportion design of pumping concrete.

Workability and proportion design of pumping concrete ...

Jul 01, 2013  Mixture design of concrete is an often discussed topic in concrete study, concrete’s workability varies with the proportion change. Tregger et al. mentioned a way to test the segregation of self-consolidating concrete via adding different ratios of viscosity-modifying agent (VMA). They conducted a mini-slump flow test and show the distribution of aggregates around the core in Fig. 1,

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Workability and proportion design of pumping concrete ...

The samples also have been tested for quantifying bleeding and segregation. We obtained the relationship between the workability aspects (the bleeding speed, segregation speed and fluidity) and the rheological parameters, thus obtained appropriate ranges of proportions for the good workability of concrete pumping.

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Workability and proportion design of pumping concrete ...

Request PDF Workability and proportion design of pumping concrete based on rheological parameters In this paper a method is introduced to find an optimized ratio of

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PROPERTIES AND MIX DESIGNATIONS

possible mix design adjustments by the Mn/DOT Concrete Engineering Unit. The factors that affect the workability of concrete are size distribution of the aggregate, shape of the aggregate particles, gradation and relative proportions of the fine and coarse aggregate, plasticity, cohesiveness, and consistency of the mi x.

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Concrete Mix Design: Proportioning - National Precast ...

Sep 11, 2018  ACI 211.1, “Standard Practice for Selecting Proportions for Normal, Heavyweight, and Mass Concrete,” has been adopted by the concrete industry as the standard procedure for mix proportioning. If you design concrete mixtures, it is definitely required reading.

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APPROACHES TO MIX DESIGN AND MEASUREMENT OF

5.4 Concrete rheology measurements 95 5.5 Results of the paste, mortar and concrete rheology comparison 98 5.6 Conclusion 103 6 MIXTURE DESIGN AND TEST RESULTS 104 6.1 Introduction 104 6.2 Literature review 104 6.3 Proposed mixture design model 107 6.4 Laboratory Procedures 108 6.4.1 Mixture proportions 108 6.4.2 Mixing procedure 113

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10.1016/j.conbuildmat.2013.02.051 DeepDyve

Jun 11, 2020  Compared to the traditional way for concrete construction, the concrete is pumped through a pipe by concrete pumping truck; the properties and proportions of pumping concrete are quite different from that of traditional concrete. The feasibility that concrete could (can) be pumped is defined as workability, also called pumpability or flowability.

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Mix Design for Pumped Concrete with PPC, OPC, OPC+Flyash

Concretes without admixtures and of high cement content, (over about 460 kg/m 3) are liable to prove difficult to pump, because of high friction between the concrete and the pipeline.Cement contents below 270 to 320 kg/m 3 depending upon the proportion of the aggregate may also prove difficult to pump because of segregation within the pipe line.

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Coarseness -Workability -Consolidation A New Approach

Workability Factor Coarsness Factor ZoneV , Rocky Zone I , Gab Graded Zone III, Wellgraded, 3/4" and finer Zone IV, sticky Workability Box % cumulative retained 3/8” % cumulative retained #8 CF = WF = % passing #8 + 2.5x powder above 6 sacks DOT specified box

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APPROACHES TO MIX DESIGN AND MEASUREMENT OF

5.4 Concrete rheology measurements 95 5.5 Results of the paste, mortar and concrete rheology comparison 98 5.6 Conclusion 103 6 MIXTURE DESIGN AND TEST RESULTS 104 6.1 Introduction 104 6.2 Literature review 104 6.3 Proposed mixture design model 107 6.4 Laboratory Procedures 108 6.4.1 Mixture proportions 108 6.4.2 Mixing procedure 113

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Types And Factors of Concrete Mix Design - Maple Concrete ...

Jun 10, 2015  The factor that controls this variation is termed as quality control. To know more about concrete mix design and other concrete pumping services and equipments, feel free to contact our Maple experts at: 647 529 PUMP. Maple Concrete Pumping will provide you well maintained equipments and quality service at affordable range.

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What is Workability of Concrete? - Gilson Co.

Workability of Concrete is a broad and subjective term describing how easily freshly mixed concrete can be mixed, placed, consolidated, and finished with minimal loss of homogeneity. Workability is a property that directly impacts strength, quality, appearance, and even the cost of labor for placement and finishing operations.

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Estimation of the Pumping Pressure from Concrete ...

For each concrete mix proportions chosen, the pumping pressure should be calculated by , ... H. Xie, F. Liu, Y. Fan et al., “Workability and proportion design of pumping concrete based on rheological parameters,” Construction and Building Materials, vol. 44, pp. 267–275, 2013.

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What Are The Factors That Affect Workability of concrete.?

Aug 11, 2020  importance of Concrete Workability. The workability of concrete is very important in quality control standards and should not be ignored on concrete projects. Many factors affect. The workability of concrete is essential to allow concrete to be set and compressed into the formwork (in some cases with a concrete pump).

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(PDF) Effect of additives' ratios on workability and ...

Self-compacting concrete (SCC) is a new type of. concrete. It fills all sections of forms without. mechanical vibration, and has reasonable flow-. ability, homogeneity, resistance aga inst ...

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What is the workability of a concrete mix design? - Quora

Answer (1 of 2): IS:6461 (Part-VII) - 1973 defines workability as that property of freshly mixed concrete or mortar which determines the ease and homogeneity with which it can be mixed, placed, compacted and finished. Mostly slump test is used on construction sites to determine the workability as...

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Difference between design mix and nominal mix of concrete?

May 18, 2020  Concrete is the most extensively material composed of cement,sand,coarse and fine aggregates with is mixed with water thats in turn hardens. During the formation of concrete mix we can add plasticizers whether they are accelerating/retarding plasticizers which depends on the design mix considerations.Morever, temperature is the important factor which can effect the concrete and the

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Procedure for Concrete Mix Design of M30 Concrete – Civil ...

In this case w/c = 0.4 lower by 0.10. So, the proportion of volume of coarse aggregate is increased by 0.02 (at the rate of ± 0.01 for every ± 0.05 change in water-cement ratio). For pump or worked around congested reinforcing steel required more workable concrete the coarse aggregate proportion may be reduced up to 10%. Hence,

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Concrete mix design - ready mix concrete, concrete pump ...

Objectives of Mix Design: The purpose of concrete mix design is to ensure the most optimum proportions of the constituent materials to fulfil the requirement of the structure being built. Mix design should ensure the following objectives. (a) To achieve the designed/ desired workability in

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Design Mix ofHigh strength concrete of M75 asLatest Is ...

Mar 30, 2020  F’ck = fck + factor based on grade of High strength concrete , whichever is higher For M75 grade concrete Factor based on grade of concrete = 8.00. Standard Deviation = 6.00 F’ck= 75 + 1.65 X 6 = 84.90 N/mm2. F’ck = 75 + 8 = 83.00 N/mm2. Hence higher value of F’ck = 84.90 N/mm2 is to be used for design calculations As per Table 1 para 2 ...

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Designing and Proportioning Normal Concrete Mixtures ...

ence on proportioning concrete mixtures because they affect the workability of the fresh concrete. They are: 1. Grading (particle size and distribution) 2. Nature of particles (shape, porosity, surface texture) Grading is important for attaining an economical mix-ture because it affects the amount of concrete that can be

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What Are The Factors That Affect Workability of concrete.?

Aug 11, 2020  importance of Concrete Workability. The workability of concrete is very important in quality control standards and should not be ignored on concrete projects. Many factors affect. The workability of concrete is essential to allow concrete to be set and compressed into the formwork (in some cases with a concrete pump).

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Concrete mix proportioning as per IS 10262:2009 ...

concrete mix design. The new code can now be used for designing a variety of concrete mixes using both mineral and chemical admixtures. With this code RMC having high degree of workability facilitating pumping can also be designed. In this paper an effort has been made to examine the major differences between BIS and the

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CEMENT CONCRETE MIX DESIGN - Dronacharya

The common method of expressing the proportions of ingredients of a concrete mix is in the terms of parts or ratios of cement, fine and coarse aggregates. For e.g., a concrete mix of proportions 1:2:4 means that cement, fine and coarse aggregate are in the ratio 1:2:4 or the mix contains one part of cement, two parts of fine aggregate and

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Types and Factors Affecting Concrete Mix Design You Need ...

Feb 05, 2020  It’s good to test the cement for performance beforehand depending on its usage. #2. Water to Cement Ratio. This is a major contributing factor to the final Concrete Mix Ratio for Slab. So, it’s imperative to test the water-cement ratio for workability, consistency, setting, and concrete slump. #3.

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(PDF) Concrete Mix Design (DOE) Engr. Emmanuel Ofori ...

Concrete like other engineering materials needs to be designed for properties like strength, durability, workability and cohesion. 1.1 Mix Design Concrete mix design is the process of selecting the proportions of cement, water, fine and coarse aggregates and, if they are to be used, additions and admixtures to produce an economical concrete mix ...

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What is the workability of a concrete mix design? - Quora

Answer (1 of 2): IS:6461 (Part-VII) - 1973 defines workability as that property of freshly mixed concrete or mortar which determines the ease and homogeneity with which it can be mixed, placed, compacted and finished. Mostly slump test is used on construction sites to determine the workability as...

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What is Workability of Concrete? Types, Mechanism - Civil ...

Types, Mechanism. Workability is a property of raw or fresh concrete mixture. In simple words, workability means the ease of placement and workable concrete means the concrete which can be placed and can be compacted easily without any segregation. Workability is a vital property of concrete and related with compaction as well as strength.

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Procedure for Concrete Mix Design of M30 Concrete – Civil ...

In this case w/c = 0.4 lower by 0.10. So, the proportion of volume of coarse aggregate is increased by 0.02 (at the rate of ± 0.01 for every ± 0.05 change in water-cement ratio). For pump or worked around congested reinforcing steel required more workable concrete the coarse aggregate proportion may be reduced up to 10%. Hence,

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Concrete Mix Ratio, Types, Proportioning of Concrete Mix ...

Standard Mix. The nominal concrete mix of a fixed proportion of cement, sand and aggregate provide considerable variation in strength resulting in the poor or over-rich mix. Hence minimum compressive strength has been assigned in many proportions and termed as the standard mix. As per IS 456:2000 Standard Concrete grades are M 25, M 30, M 35, M ...

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Difference between design mix and nominal mix of concrete?

May 18, 2020  Concrete is the most extensively material composed of cement,sand,coarse and fine aggregates with is mixed with water thats in turn hardens. During the formation of concrete mix we can add plasticizers whether they are accelerating/retarding plasticizers which depends on the design mix considerations.Morever, temperature is the important factor which can effect the concrete and the

Get Price

Workability and compressive strength properties of normal ...

Sep 07, 2019  This study evaluates the workability and compressive strength properties of normal weight concrete (NWC) using high dosage of fly ash cement replacement. The goal is to find the suitable mix proportion of G40 NWC and to study the slump-loss at different interval time with fly ash replacement up to 60%. The strength properties of NWC were investigated using rebound hammer

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Design Mix ofHigh strength concrete of M75 asLatest Is ...

Mar 30, 2020  F’ck = fck + factor based on grade of High strength concrete , whichever is higher For M75 grade concrete Factor based on grade of concrete = 8.00. Standard Deviation = 6.00 F’ck= 75 + 1.65 X 6 = 84.90 N/mm2. F’ck = 75 + 8 = 83.00 N/mm2. Hence higher value of F’ck = 84.90 N/mm2 is to be used for design calculations As per Table 1 para 2 ...

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Concrete Mix Design Calculation for M20, M25, M30 Concrete

Concrete Mix Design is the procedure of selecting suitable proportions of cement, sand, and aggregates for concrete to achieve the desired strength in structures. In the Concrete Mix Design process each and every ingredient of concrete is tested in laboratory.

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