Properties of Fresh Concrete and Factors Affecting …
Factors affecting setting: Following are the factors that affect the setting of concrete. 1. Water Cement ratio 2. Suitable Temperature 3. Cement content 4. Type of Cement 5. Fineness of Cement ... In such a case, …
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3 Curing Techniques to Improve the Compressive Strength of Concrete
3 Techniques for Efficient Concrete Curing. Many factors affect the rate at which water evaporates from freshly placed concrete. This includes air temperature, humidity, concrete temperature, and wind speed. As a result, many techniques have been developed to help concrete retain moisture at the early ages. These methods are used to:
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What Factors Affects Air Content of Concrete? - The Constructor
🕑 Reading time: 1 minuteGenerally, concrete is required to be air entrained event if it is not exposed to freezing and thawing due to important benefits that concrete enjoys in other ways such as improving concrete workability. Concrete air entrainment is not an easy process since it is influence by several factors. These factors shall […]
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Impact of Water Quality on Strength Properties of Concrete
Abstract. The hardening of cement gives strength and durability to concrete. The quality of mixing water may affect the setting, hardening and strength of the concrete. Great control on properties ...
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Effects of Temperature on Concrete - Limitless Paving & Concrete
Higher temperatures can lead to an expansion in concrete, and this can lead to cracks. The overall length of the concrete structure can also lead to additional stresses in the composition. This factor is especially important in bridges. Low temperatures, on the other hand, can lead to shrinkage of the concrete and this can be disrupted if water ...
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Quality control of concrete - SlideShare
To know the quality of concrete, We can do the several tests. (1) Tests on Fresh Concrete a) The Slump test b) The Compacting Factor Test (2) Tests on Hardened Concrete a) Compression Test b) Tensile Strength Test (Split Cylinder Test) c) Flexural Strength Test. 6. 6 (1)Tests on Fresh Concrete (a) The Slump Test The mound for the slump test has ...
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Quality in Construction Industry -Objectives, Factors Affecting Quality ...
Quality in construction industry can be defined as the attainment of acceptable levels of performance from construction activities. This performance would be attained when the activity meets or exceeds the requirement of the client or the owner. The quality of any product or service is achieved when it conforms to the desired specifications.
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Perceptions on construction-related factors that affect …
factors affect concrete quality, costs and production rates. The objectives are: (1) identify and evaluate the perceived importance of construction-related factors that affect
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HOW AGGREGATE PROPERTIES AFFECTS CONCRETE PROPERTIES?
Grading of aggregates is an important aspect as they can influence the various properties of concrete such as cohesion, water demand, workability and strength. Aggregates should be well graded and consistent in their grading. Fine aggregates are the aggregates, most of which passes through 4.75 mm IS sieve and contained only so much coarser ...
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Top 15 Factors Affecting Strength of Concrete - PRODYOGI
1. Ratio of Cement to the Mixing Water. For concrete that has to be compacted by a vibrator, a lower water cement ratio may be used. The maximum strength is derived at w/c = 0.4. When …
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Bond, Reinforcement Bond - Precast
Factors affecting bond. Reinforcing bond is developed by adhesion, friction and mechanical means. 2 Adhesion offers the least amount of bond and is primarily created by the chemical interaction between the concrete paste and the reinforcement. Friction bond is the resistance created by the reinforcement and the concrete surface pressing against it.
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(PDF) Factors influencing concrete quality: a survey to the …
The purpose is to contribute to environmental aspects as this factor affects the concrete by 34.3% in relation to its quality, according to …
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Factors That Affect the Quality of Concrete
As the professional manufacturer of concrete mixers and concrete batching plants, we will tell you some factors that affect the quality of concrete. 1. Compressive strength Concrete compressive strength is proportional to …
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Concrete Production - an overview | ScienceDirect Topics
Concrete production is a highly intensive energy-consuming process and presently facing a number of challenges in reducing the carbon footprint and making it more economic. Sustainable technologies in maintaining concrete structures are proving to be a great challenge. Microbially induced carbonate precipitation (MICP) has developed as a novel and sustainable technique …
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A systematic review of factors affecting properties of thermal ...
The production of thermal-activated RC involves three main related steps, namely: separation of the cement fraction from the other components of the waste concrete; grinding to suitable particle size; thermal activation. ... Many factors affect the properties of thermal-activated RC in the stage of thermal activation and its rehydration ...
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QUANTIFYING THE EFFECT OF CONSTRUCTION SITE …
compaction method are the top three factors perceived by construction experts to affect concrete compressive strength, whereas crew experience, mixing time and compaction …
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10(16), 120 – 139 Perceptions on construction-related factors …
Perceptions on construction-related factors that affect concrete quality, costs and production Jorge Santamaria1,3*, Vanessa Valentin 2 1 Department of Civil Engineering, University of New Mexico, ... highly affect concrete quality, costs and production rates. The quality metric for concrete was also determined from the literature and survey ...
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EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON …
coarse aggregate contents with aggregate volume factors (ACI 211.1-91) of0.75 and 0.67. Water-to-cementitious material ratios range from 0.24 to 0.50. Compressive ... strength concrete containing the basalt or limestone used in this study is not affected by aggregate type, and is limited by the matrix strength and the strength of the ...
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Effects of Aggregate Properties on Concrete - Size, Grading
Effect of Size. The grading or size distribution of aggregate has a considerable effect on the properties of concrete as it determines the paste requirement for workability of concrete. The paste also affects the cost of the mix as cement is the most expensive component in the mix. Hence, it is required that optimum size of aggregates is used ...
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What Factors Causes Failure of Concrete Structures? - The …
The main factors that affect the failure of concrete structures are: Incorrect selection of materials. Errors in design calculation and detailing. Improper construction techniques and insufficient quality control and supervision. Chemical attacks on concrete structures. External mechanical factors.
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Aggregates for Concrete - American Concrete Institute
3.4.2—Factors affecting bulk density 3.5—Particle shape, angularity, and surface texture ... in concrete, aggregate properties affecting performance of the concrete, tests used to measure aggregate properties, and ... quality or, more importantly, its service record, or both.
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Key Factors Affecting Strength of Concrete - Structural …
In general, cement is considered one of the highly influential factors affecting strength of concrete. Aggregates Aggregate is the material bond with the cement paste after reacting with water. Therefore, the quality of the aggregate effect …
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A Study on the Quality Control of Concrete Production in Dhaka City
Skill of labors in placing concrete: As discussed in RMC quality factors, Workmanship is a significant factor affecting the quality of the concrete mix [4]. 6. 6.
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2dh-3 3 yard portable concrete mixer what are the factors that affect …
Thousands of 1-yard concrete mixing trailers are on the road across North America and have mixed over a million cubic yards of concrete. Larger Mixing Capacity. A 1.75-yard towable concrete mixer is the perfect alternative when 1-yard is just not enough. The 1.75-cubic yard portable concrete mixer can be towed behind a heavy-1/2 ton or larger ...
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What are the Factors Affecting the Choice of Concrete Mix Design?
The various factors affecting the choice of concrete mix design are: 1. Compressive strength of concrete. Concrete compressive strength considered as the most important concrete property. It influences many other describable properties of the hardened concrete. The mean compressive strength (fcm) required at a specific age, usually 28 days ...
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Durability of Concrete | Types of Durability and Factors Affecting ...
Factors affecting durability of concrete. Durability of Concrete depends upon the following factors. Cement content. Mix must be designed to ensure cohesion and prevent segregation and bleeding. If cement is reduced, then at fixed w/c ratio the workability will be reduced leading to inadequate compaction. However, if water is added to improve ...
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Concrete - Wikipedia
Concrete is a composite material composed of fine and coarse aggregate bonded together with a fluid cement (cement paste) that hardens (cures) over time. Concrete is the second-most-used substance in the world after water, and is the most widely used building material. Its usage worldwide, ton for ton, is twice that of steel, wood, plastics, and aluminum combined.
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7 Factors to Consider When Choosing Precast Concrete vs. Tilt …
Here is a list of 7 factors that Owners need to consider. Location – Where your project is located is a key factor to consider when deciding if tilt wall versus precast concrete construction will work for your project. With a little planning, typical weather patterns won't affect the ability to cure and cast tilt wall panels on-site.
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PRODUCTIVITY AND MODULAR COORDINATION IN CONCRETE MASONRY …
Modular coordination is the practice of laying out and dimensioning structures to standard lengths and heights to accommodate modular sized building materials. Standard concrete masonry modules are typically 8 in. (203 mm) vertically and horizontally, but may also include 4- in. (102-mm) modules for some applications.
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15 Factors Affecting Durability of Concrete - The …
Following are the factors affecting durability of concrete. Cement Content Aggregate Quality Water Quality Concrete Compaction Curing Period Permeability Moisture Temperature Abrasion Carbonation Wetting and …
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Factors Affecting Strength and Durability of Concrete …
the quality of the concretes produced by the various cements. 2. Identify the cement properties responsible for the observed variations in the quality of the concrete specimens. 3. Develop a methodology to help predict the quality of a concrete produced by a cement. It was decided that the quality of the concrete should be
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SIGNIFICANT FACTORS AFFECTING CONSTRUCTION …
direct factors and their root causes. Based on this, a stratified model for factors affecting productivity, was built to present the cause-effect relationship among factors of different levels, which include factors on activity level and factors on project level. Unproductive activities were regarded as the root cause for the loss of productivity.
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