Factors Affecting the Setting and Hardening of Portland cement (1) The Impact of Cement's Composition. The mineral composition of cement and their ratios are the main factors affecting the setting and hardening of cement. As mentioned above, various mineral components will reveal different characteristics when reacting with water.
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This paper mainly gives an overview of factors affecting the effectiveness of internal curing in cement-based materials from three aspects: the amount of internal …
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The curing methods for high strength concrete presented in the study include steam curing, oven curing, autoclave curing, dry curing, burlap curing, high and low temperature curing, vacuum curing and internal curing. The performance of the concrete depends on several factors and quantifying them simultaneously may not be …
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Drying shrinkage is the contraction in the concrete caused by moisture loss from drying concrete. Shrinkage-compensating concrete is used to minimize cracking and structural movement caused by drying shrinkage in concrete. The amount of drying shrinkage that occurs in concrete structures depends on the constituent materials, …
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When new concrete is placed next to old concrete, attempts are usually made to bond the two concretes together: often a cement paste or mortar "joint" is used, ... Factors Affecting Bond Between New and Old Concrete. Author(s): ... Volume: 85. Issue: 2. Appears on pages(s): 117-125. Keywords: bond (concrete to concrete); bonding; cement pastes ...
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Factors Affecting Curing Time. There are a variety of factors that may affect a concrete slab or structure's curing time. The most notable of these – moisture – plays a role at every step of the concrete application process. If, for example, a concrete mixture has more water added than an average mixture, it will likely take longer to cure.
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5. Age of Concrete. The hydration of cement increases with the increasing the age of concrete. In controlled curing, of concrete the maximum strength of concrete will achieve at 28 days and will increase in decreasing rate till two years and final strength will achieve only after one to two years of placement.
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What factors can affect concrete curing time? Factors affecting concrete curing time include its composition, ambient conditions, water-cement ratio, and the curing method used. These elements are crucial in determining the curing duration. Related Blogs to Concrete Cure Time. Concrete Curing Temperature Chart: Optimizing Strength
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Jiang et al. studied the main factors affecting the mechanical properties of early alkali slag concrete. It was found that the compressive strength increased with the …
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In this study, a model was proposed to describe the CO 2 curing of concrete. Then, it examined the effects of several factors, including preconditioning parameters, compaction pressure, CO 2 concentration and pressure on CO 2 curing kinetics of …
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The effectiveness of quality control of concrete depends on seven important factors, including proper materials selection, accurate proportions and mixing, and proper curing techniques. Construction professionals must prioritize quality control of concrete to meet industry standards and regulations and ensure the long-term performance of ...
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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 …
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The objective of this investigation was to study the effects of a number of factors on the setting time and mechanical behavior of polymer concrete. Factors inc
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In this study, a model was proposed to describe the CO2 curing of concrete. Then, it examined the effects of several factors, including preconditioning parameters, compaction pressure, CO2 concentration and pressure on CO2 curing kinetics of concrete compacts. Results indicated that a dry preconditioning before CO2 curing was critical for …
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Setting time of cement is same as setting time of concrete. Stages of setting of cement, setting times of cement and factors affecting and initial and final setting time of different cements and various processes …
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Fig 4: Compacting Fresh Concrete Curing Period. ... In conclusion, understanding and addressing the multitude of factors affecting concrete durability are essential for ensuring the longevity and structural integrity of constructions. By implementing appropriate design, construction, and maintenance practices, the adverse effects of these ...
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Curing of concrete is one of the most important factors in concrete construction as it is related to properties such as characteristic strength, permeability, durability, etc.Further, it is required to do the curing at the right time and a sufficient period of curing is very important to achieve the exact properties of concrete.
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Proper curing involves keeping the concrete moist and at a temperature between 50 to 90°F for at least 7 days. ... In conclusion, various factors in concrete production can affect its workability. These include the consistency of the mix, the amount and type of cement used, the amount of water added to form the paste, the size and …
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The American Concrete Institute (ACI) is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical resources, educational programs, certification programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, …
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The compressive strength of concrete is influenced by an array of factors, which include the quality of raw materials, water-to-cement ratio, curing process, …
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Effect of water/cement ratio on the development of the compressive strength for ed concrete with Tek ing agent and target dry density 600 kg/m 3 for different curing conditions
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Request PDF | Factors affecting kinetics of CO 2 curing of concrete | In this study, a model was proposed to describe the CO2 curing of concrete. Then, it examined the effects of several factors ...
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Factors affecting the workability of concrete are materials such as water content, cement concrete, sand and aggregate properties such as size, shape, grading, mix design ratio and use of admixtures. ... Curing Methods for Different Types of Concrete Construction. Next article. RELATIVE DENSITY OF WATER W.R.T. TEMPERATURE. Gopal Mishra.
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The various factors affecting the choice of concrete mix design are: 1. Compressive strength of concrete. ... mixing, placing, curing and testing. Finally, the lower the difference between the mean and minimum strengths of the mix lower will be the cement-content required. The factor controlling this difference is termed as quality control.
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Concrete sets and hardens as a result of a chemical reaction between cementitious materials and water. This process is called hydration. Curing is the process of maintaining satisfactory temperature and moisture conditions in concrete long enough for hydration to develop the desired concrete properties. The potential strength and …
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Concrete that has been specified, batched, mixed, placed, and finished can still be a failure if improperly or inadequately cured. Curing is usually the last step in a concrete project and, unfortunately, is often neglected even by professionals. Factors Affecting Curing of Concrete. The best curing method depends on: Cost; Application ...
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The curing degree of the concrete blocks after 2 h of CO 2 curing is shown in Fig. 12. Regardless of which types of aggregate were used, the curing degree of the fly ash-lime based specimen was higher than that of the cement based specimen. This may be due to lime having a larger specific surface area (4850 cm 2 /g) than cement (3519 cm 2 …
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The present article reviews studies that used microwave curing, autoclave curing, carbon curing, steam curing, electric curing, ambient and air curing and water to …
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Microwave curing has a significant role in accelerating concrete curing. Leung and Pheeraphan [80] determined the potential of this method to achieve early high-strength pre-casted concrete. Many factors, such as duration and application of microwave, microwave power and others, affect concrete development.
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🕑 Reading time: 1 minute Modulus of elasticity of concrete is the ratio of the stress to the strain of the concrete under the application of loads. It is one of the very crucial properties of concrete that gets affected with the influence in concrete strength, aggregate, cement paste, mix proportion, moduli of elasticity of the ingredients, and the characteristics of …
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The creep of concrete is a crucial characteristic to be taken into account in structural design, which can significantly impact the long-term durability and performance of concrete structures. Creep refers to the gradual deformation and flow of concrete over time under sustained loading. In this section, we will explore the concept of creep in concrete, the …
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Effects of Microwave Curing on the Mechanical Properties of Ultra-high Performance Concrete and Affecting Mechanism: GAO Xiaojian 1,2, LI Shuangxin 1,2: 1 School of Civil Engineering, Harbin Institute of Technology, Harbin 150001 2 The Key Laboratory of Structural Engineering Catastrophe and Control of the Ministry of Education, Harbin …
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Title: A Summary of Factors Affecting Concrete Salt-Scaling Performance Author(s): Kamran Amini, Kristen Cetin, Halil Ceylan, and Peter C. Taylor Publication: Materials Journal Volume: 117 Issue: 3 Appears on pages(s): 53-62 Keywords: curing regimes; hardened properties; mixture components; multiple regression analysis; salt …
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ACI 308 – Guide to Curing Concrete suggests three phases of concrete curing. These phases are shown in figure 1.6 of ACI 308. The right time of curing of concrete depends on: 1. Initial Curing . When the concrete is placed and compacted, bleeding of water occurs and rises through the surface of concrete due to the settlement of concrete.
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