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Curing of Concrete

concrete is to achieve its potential strength and durability Curing may also encompass the control of temperature since this affects the rate at which cement hydrat The curing period may depend on the properties required of the concrete, the purpose for which it is to be used, and the ambient conditions, ie...

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Effect of Temperature on Thermal Properties of High ,

May 24, 2000 0183 32 The thermal properties are presented in equations that express the values of these properties as a function of temperature in the temperature range between 0 and 1,000 176 C The effect of temperature on thermal conductivity, thermal expansion, specific heat, and ,...

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Temperature Effects on Rheological Properties of Fresh ,

Cemented paste backfill CPB is an economic and environmental friendly technique applied in underground mining for supporting surrounding rock and replacing the pillar However, little is known about the temperature effects on CPB in mines having a large temperature fluctuation The main purpose of this research was to investigate the effect of temperature change on the rheological ,...

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Effect of High Temperature Process on Microstructure and ,

The construction industry continues to develop and the requirements for cement performance are getting higher and higher At the same time, in the steel industry, the discharge of steel slag is also increasing The effective reuse of steel slag has become a prominent problem in the steel industry Therefore, it is envisaged to use steel slag as a raw material for the cement production ....

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Effect of Thermal Properties of Aggregates on the ,

Ordinary Portland cement OPC having a specific surface area of 3160 m 2 /g and a density of 3150 kg/m 3 was used SiO 2 represented more than 90 of the silica fume SF , which had a specific surface area of 200,000 m 2 /g and a density of 2200 kg/m 3For the coarse aggregates, granite was selected as the natural aggregate, and ash-clay and clay as the lightweight aggregat...

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Effect of Water to Cement Ratio and Temperature on ,

The main objective of this study was to investigate the effect of water to cement ratio and temperature on electrical resistivity, and piezoresistive sensitivity of smart cement 3 Materials and Methods Class H cement with water to cement ratio of 038, 044 and 054 was used in the experiments...

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Gypsum Dehydration During Comminution and Its Effect on ,

Gypsum Dehydration During Comminution and Its Effect on Cement Properti G Goswami, Dalmia Institute of Scientific and Industrial Research, Rajgangpur 770017, India , because of the rising temperature during grinding, gypsum was dehydrated to hemihydrate, while there was no dehydration in the laboratory mill 45 cm 45 cm grinding ....

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Effect of High Temperatures on Concrete Concrete ,

Dec 01, 1999 0183 32 Abrupt temperature changes can cause cracking and spalling due to thermal shock, and aggregate expansion can also produce distress within the concrete High temperatures also affect the compressive strength of concrete Above 212ยบ F, the cement paste begins to dehydrate loses chemically combined water of hydration , which gradually weakens ....

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Coupled Effect of Temperature and Strain Rate on ,

Sep 01, 2020 0183 32 The dynamic mechanical properties of steel fiber-reinforced concrete SFRC under high temperature and high strain rate were studied using a split Hopkinson pressure bar SHPB of 74 mm in diameter As it is difficult to achieve constant strain rate loading in SHPB experiments with high temperature and high strain rate, this paper first presents a method for determining the strain rate ,...

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PDF EFFECT OF CALCINATION TEMPERATURE OF RICE HUSK ,

The effect of calcination temperature of rice husk on the properties of rice husk ash RHA and RHA mortar was investigated The rice husk was prepared using the water beneficiation method and ....

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Effect of moisture and temperature on the mechanical ,

Downie, Brian, Effect of moisture and temperature on the mechanical properties of concrete 2005 Graduate Theses, Dissertations, and Problem Reports 1625 https //researchrepositorywvuedu/etd/1625...

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Effect of Temperature on Flow Properties of ,

The effects of the ambient temperature over a range of 5 to 40 176 C 41 to 104 176 F on the flow behavior of cement pastes with superplas - ticizers of different families were investigated...

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Cement Manufacture, Chemical Composition, Heat of ,

temperature to form more complex compounds The relative proportions of these oxide compositions are responsible for influencing the various properties of cement in addition to rate of cooling and fineness of grinding Chemical Composition of Portland Cement ....

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Portland Cement, Concrete, Volume 18/Number 2 and Heat ,

Cement on the Go Portland Cement, Concrete, and Heat of Hydration Fig1 demonstrates the effect of element size on concrete tempera-ture with time due to the heat of hydration Temperature rises of 55 176 C 100 176 F have been observed with high ce-ment content mix 2 These tem-perature rises cause expansion while the concrete is hardening If ....

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Effect of mixing slab temperature on the properties of ,

Effect of mixing slab temperature on the properties of zinc phosphate cement Rev Asoc Odontol Argent Sep-Oct 1974 62 9-10 242-6...

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Literature Review of the Effects of Radiation and ,

The accessible literature was searched for reports on the effects of radiation and temperature on concrete deterioration The effects of low doses,...

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Review Article Properties of Concrete at Elevated Temperatures

Fire response of concrete structural members is dependent on the thermal, mechanical, and deformation properties of concrete ese properties vary signi cantly with temperature and also depend on the composition and characteristics of concrete batch mix as well as ,...

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The Effect of Curing Temperature on the Properties of ,

Effect of High Temperatures on Concrete Concrete ....

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Blending Different Fineness Cements to Engineer the ,

adjusting the fineness of a belite-based cement provides the possibility to manufacture concrete with various requisite properti Extending on these findings, this paper explores the possibility of engineering properties by the controlled blending of a fine and a ,...

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Effect of temperature on the physico

Effect of temperature on the physico-mechanical and mineralogical properties of Homra pozzolanic cement pastes The effect of temperature on the phase composition and physico-mechanical properties of cement pastes is vital for fire resistance Addition of fine, divided materials, such as dehydrated aluminum silicate fired clay , natural ....

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RAW MATERIALS Burning the mix

consumption Emphasis is placed on the effects of changes in raw material burnability and clinker formation on kiln operations, finish mill productiv-ity, and the properties of the resulting cement by Linda M Hills, Senior Scientist Vagn Johansen, Senior Principal Scientist and F MacGregor Miller, Senior Principal Scientist...

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Effects of Curing Temperature and Pressure on the Chemical ,

Oct 10, 2011 0183 32 2011 Theses Doctoral Effects of Curing Temperature and Pressure on the Chemical, Physical, and Mechanical Properties of Portland Cement Pang, Xueyu This dissertation mainly focuses on studying the fundamental hydration kinetics and mechanisms of Portland cement as well as the effects of curing temperature and pressure on its various properti...

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The Effect of Elevated Temperature on Concrete Materials ,

Mar 01, 2006 0183 32 The objective of this limited study was to provide an overview of the effects of elevated temperature on the behavior of concrete materials and structur In meeting this objective the effects of elevated temperatures on the properties of ordinary Portland cement concrete constituent materials and concretes are summarized...

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Effects of Ground Granulated Blast Furnace Slag in ,

of 0 , 30 , and 50 The primary concrete properties studied were compressive strength, split-tensile strength, and deicer scaling resistance Material variations included four sources of ordinary portland cement and two types of coarse aggregate Strength properties were studied at room temperature and 40 176 F mix and curing conditions...

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Effect of Curing on Mechanical Properties of Cement ,

Jul 22, 2020 0183 32 The use of coral sand prepared from cement-stabilized materials can significantly reduce the cost, construction period, and damage to the environment caused by stone mining The choice of water in mixing and curing the cement-stabilized materials on islands should be considered Cement-stabilized coral sand was tested in three different preparation and maintenance systems in the marine ....

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EFFECTS OF ELEVATED TEMPERATURE EXPOSURE ON ,

Mature cement paste is normally composed of 50-60 C-S-H, 20-25 CH and other chemical compounds, such as ettringite, monosulfate, and unhydrated cement particles 17 Macroscopic properties of cement-based composite materials at high temperatures are governed by the properties of these phases, which demands detailed knowledge of the...

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Effect of Curing Temperature on Hardened Concrete ,

Effect of Curing Temperature on Hardened Concrete Properties Mixtures of Ground Granulated Blast Furnace Slag, Fly Ash, or a Combination of Both Often, concrete is not mixed or placed under ideal conditions Particularly in the winter or the summer months, the temperature of fresh concrete is quite different from that of concrete mixed under ....

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THERMAL DEGRADATION OF CONCRETE IN THE ,

This report is concerned with determining the effect of elevated temperatures on the behavior of concrete Emphasis is placed on quantifying the degree of potential degradation of the physical properties of concrete in high-level waste storage tanks The temperature elevation range of interest is from ambient to 315 176 C 600 176 F...

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The Effects Of Temperature On Concrete During Installation ,

Oct 04, 2017 0183 32 Increased temperatures affect increasing initial power while reducing strength in the long term Temperature variations can have effects on different properties of concrete Early high temperatures affect the later strength of concrete, ,...

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Effect of press temperature on some properties of cement ,

The mixture of wood/cement/water was hand formed inside a wooden mold Afterwards, the hand-formed panel was removed from the wooden mold and compressed in a hot press under a pressure of 18-20 kg/cm 2 for 24 hrs In the first 8 h of pressing, 8 different temperatures for each group were applied and then the pressing continued for 16 h at ambient temperature...

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