Properties of Concrete - Workability, Setting, Bleeding ,

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 6 Relative Humidity 7 Admixtures 8 Type and amount of Aggregate 2 Workability of Concrete...

The Importance of the Factors Affecting Concrete Shrinkage

The Importance of the Factors Affecting Concrete Shrinkage 1 Purpose This paper summarises the research on the causes creating shrinkage strains in concrete and thus the likelihood of shrinkage cracking, illustrates the conflicting requirements in the selection of concrete properties and attributes and provides information on the relevance...

FACTORS AFFECTING THE CURING AND STRENGTH OF POLYMER ,

FACTORS AFFECTING THE CURING AND STRENGTH OF POLYMER CONCRETE Journal of the American Concrete Institute, 80(5), , investigation was to study the effects of a number of factors on the setting time and mechanical behavior of polymer concrete Factors included the initiator-to-promoter ratio, initiator and promotor levels, casting temperature ....

What is Concrete Strength and what are the factors ,

Concrete Strength Cement like water, aggregates and some times admixtures is one of the ingredient of concrete The mixing of these materials in specified proportions produces concrete Accordingly cement alone is not a building material, it is the concrete which is a building material...

Important Factors Affecting the Compressive Strength of ,

The Factors Affecting the Compressive Strength of Concrete are Water Cement Ratio Quality of cement and chemical constituents Storage of cement Aggregate Water Moisture in aggregate Slump Degree of compaction ,...

Factors Affecting the Curing and Strength of Polymer Concrete

The American Concrete Institute Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design ....

Rheology of Concrete- Factors Affecting Rheological ,

The factors affecting the rheological properties of the concrete are explained below: 1 Mix Proportion of Concrete Affecting the Rheology 2 Consistency of Concrete Affecting the Rheology 3 The hardening and Stiffening of Concrete Affecting the Rheology 4 Shape and Texture of Aggregate affecting the Rheology 5...

Cracks in Concrete -- the Causes and Cures| Concrete ,

The mineral composition, shape, surface texture, and grading of aggregate variously affect the required proportions, thermal coefficient, drying shrinkage, stiffness, creep, and strength of concrete Some admixtures may also affects cracking because of their effects on such contributory factors as rate of hardening, shrinkage, and creep...

Curing of Concrete

Liquid Membrane-forming Curing Compounds for Concrete They are an efficient and cost-effective means of curing concrete and may be applied to freshly placed concrete or that which has been partially cured by some other means However, they may affect the bond between concrete and subsequent surface treatments Special care in the choice of a...

What is Concrete Shrinkage and what are the factors ,

Concrete Shrinkage : The volumetric changes of concrete structures due to the loss of moisture by evaporation is known as concrete shrinkage or shrinkage of concrete It is a time-dependent deformation which reduces the volume of concrete without ....

Consider the Cure - Part One: Factors affecting proper ,

Consider the Cure - Part One: Factors affecting proper concrete curing practices Nov 20, 2014 Thanks to the brutal winter of 2013, many people noticed scaling or mortar flaking in new exterior concrete flatwork such as sidewalks, driveways, parking lots, and curbs and gutters This superficial deterioration can be the result of many factors ....

FACTORS AFFECTING REINFORCED CONCRETE ,

Figure 35 Curing of recently cast reinforced concrete columns 33 Measures for Quality Improvement There are a number of factors that may affect the quality of RC construction and the working life of the constructed facility However, almost all of these factors ,...

Creep and shrinkage - SlideShare

Oct 11, 2015· Factors affecting creep 4Curing condition: In view of the smallness of creep strains, the amount of water expelled during creep from the micro pores into the macro pores (or vice versa) must also be small, probably much less than 01 percent of the volume of concrete (since typically creep strains do not exceed 0001, and even this is not due ....

Studies on Some Factors Affecting CO2 Mixing or CO2 Curing ,

This paper deals with the effects of several factors, such as CO 2 pressure, CO 2 concentration, curing time, water- cement ratio and continued curing after CO 2 mixing or CO 2 curing of cement concrete in the above parameters Finally, the compressive strength, CO 2 reaction, and carbonation degree of concretes were tested after the specific ....

What are the factors affecting the durability of concrete ,

May 12, 2018· The strength of concrete is affected by various factors including its ingredients, environmental factors, post-processes or works, and so on 1 Increasing aggregate size increases the strength of the concrete; however, the affect is insignificant....

FACTORS AFFECTING THE WORKABILITY OF CONCRETE ,

The objective of the research is mainly to check the factors affecting workability of concrete incorporating PFA This objective then can be divided into more small objectives by dividing it into the experiment that will be done which are: " To investigate the paste consistency of cement plus PFA...

factors affecting curing of concrete

Understanding Carbonation - NPCA - Precast concrete Jul 20, 2015 Factors affecting the rate of carbonation Carbonation begins at the concrete surface and slowly penetrates deeper, typically at a rate of about 039 inches per year in high quality concrete with a low water-cementitious material ratio...

How Long Does Concrete Take To Set? | Concrete Cure TImes ,

May 26, 2019· Factors Affecting Concrete Setting Time Moisture plays a critical role in curing time for concrete If there is not sufficient water in the mix, the concrete will cure too fast, resulting in weaker overall strength Too much moisture, often used in the finishing step ,...

What is meant by Striking Formwork | Removal of Formwork ,

Aug 11, 2016· Factors Affecting Period of Striking of Formwork Period elapsed before the removal of formwork depends on various factors and will be different job to job Some of the important controlling factors that determine the time required before removal of shuttering are as follows: Type of Concrete Used...

Temperature and relative humidity: What they mean for you ,

And some sealers will not cure properly if there is too much moisture in the concrete Temperature and relative humidity are important factors to pay attention to so that your concrete dries to the degree you need it to so that the all-important sealer performs the way you and your client expect it to...

factors affecting curing of concrete

Understanding Carbonation - NPCA - Precast concrete Jul 20, 2015 Factors affecting the rate of carbonation Carbonation begins at the concrete surface and slowly penetrates deeper, typically at a rate of about 039 inches per year in high quality concrete with a low water-cementitious material ratio...

Studies on Some Factors Affecting CO2 Mixing or CO2 Curing ,

This paper deals with the effects of several factors, such as CO 2 pressure, CO 2 concentration, curing time, water- cement ratio and continued curing after CO 2 mixing or CO 2 curing of cement concrete in the above parameters Finally, the compressive strength, CO 2 reaction, and carbonation degree of concretes were tested after the specific ....

Some factors affecting early compressive strength of steam ,

(1) The content of UFA, pulverized slag, and water content are the main factors affecting the compressive strength of steam-curing concrete The preheating time and silica fume have influence on early compressive of steam-curing concrete, but have ,...

Shrinkage of Concrete, Types and Factors of Shrinkage in ,

Factors affecting of Shrinkage of Concrete One of the most important factors that affect shrinkage is the drying condition or in other words, the relative humidity of the atmosphere at which the concrete specimen is kept If the concrete is placed in 100 percent relative humidity for any length of time, there will not be any shrinkage, instead ....

CREEP

These two types of curing reduce the drying shrinkage by half as much as they reduce creep Other factors affecting creep include type of cement, amount of cement paste, size and shape of concrete, amount of reinforcement (rebar), volume-to-surface ratio, temperature, and humidity...

Curing Concrete, Chapter 12 - The University of Memphis

Curing is the maintenance of a satisfactory moisture con-tent and temperature in concrete for a period of time imme-diately following placing and finishing so that the desired properties may develop (Fig 12-1) The need for adequate curing of concrete cannot be overemphasized Curing has a strong influence on the properties of hardened concrete;...

Curing of Concrete: Purposes, Period, Effects, Factors and ,

The term curing of concrete is used to indicate all such procedures and process , Factors Affecting Evaporation of Water from Concrete: , Thus, out of four factors, only the fresh concrete temperature can be monitored or supervised by the concrete technologists...

Strength of Concrete - University of Washington

Concrete Technology 9 2) Factors affecting the strength,fc Effect of materials and mix proportions Curing conditions (Time, Temperature, , Curing of Concrete Concrete Technology Strength of Concrete , The compressive strength of concrete is measured by ,...

Cracks in Concrete -- the Causes and Cures| Concrete ,

The mineral composition, shape, surface texture, and grading of aggregate variously affect the required proportions, thermal coefficient, drying shrinkage, stiffness, creep, and strength of concrete Some admixtures may also affects cracking because of their effects on such contributory factors as rate of hardening, shrinkage, and creep...

Understanding Carbonation - NPCA - Precast concrete

Factors affecting the rate of carbonation Carbonation begins at the concrete surface and slowly penetrates deeper, typically at a rate of about 039 inches per year in high quality concrete with a low water-cementitious material ratio...