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Effect of Gypsum Fineness on the Composition of Saturation Extract of a Saline Sodic Soil Khosla, B. K.; Abrol, I. P. Abstract. Not Available . Publication: Soil Science. Pub Date: March 1972 DOI: 10.1097/00010694-197203000-00010 Bibcode: 1972SoilS.113..204K ...
18 periods in a ball mill to yield the required fineness levels of 275, 337 and 385 m2/kg. In each case, 19 gypsum was added at a rate of 5 % by mass. 20 Alkali contents were adjusted by adding NaOH (chemical pure) into water during the concrete mixing 21 stage to ensure equivalent cement alkali contents of 0.4, 0.8 and 1.2 % by mass.
Aug 10, 2021· To facilitate the analysis of the experimental results, artificial silica tailings (AT) with SiO 2 content higher than 99.8% was used to replace the natural tailings as aggregate in the experimental study. The rationality of using ST to study the CPB performance was confirmed by [13,61,62].The particle size distribution of ST is shown in Fig. 2.From Fig. 2, it is clear that the content of the ...
Gypsum with upper and lower defined... | Find, read and cite all the research you need on ResearchGate Article PDF Available Effect of gypsum fineness on reclamation of saline-sodic soil
An increase in fineness increases the amount of gypsum required for proper retardation as in finer cement, more C 3 A is available for early hydration (Neville, 2000). The water content of a paste of standard consistence is greater the finer cement, but conversely an increase in ... Figure 2: Effect of fineness on rate of bleeding of concrete ...
Explanation: Gypsum is well known retarders helps to accelerating effect of high temperature on setting properties. 51. Setting time of cement increases by adding _____ a) Gypsum b) CaCl2 c) NaOH d) Hydrogen peroxide Answer: a Explanation: Gypsum is often added to cement and concrete to slow down the drying time. Cement dries quickly.
If the content of gypsum is too little, the retardation effect will not be significant. Too much gypsum will accelerate the setting of cement because gypsum can generate a clotting agent itself. The appropriate amount of gypsum depends on the content of C 3 A in the cement and that of SO 3 in gypsum, and it is also related to the fineness of
Corrections. All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:agiwat:v:5:y:1982:i:1:p:41-50.See general information about how to correct material in RePEc.. For technical questions regarding this item, or to correct its authors, title ...
Table 11.16-1 (cont.). c Typical pollution control devices generally have a negligible effect on CO 2 emissions. d Factors for these operations are in Sections 11.19 and 13.2. e References 3-4,8,11-12. Equation is for the emission rate upstream of any process cyclones and applies only to concurrent rotary ore dryers with flow rates of 7.5 cubic meters per second (m3/s) or
However, for the most reactive type of clinker a reduced gypsum-hemihydrate ratio increased the yield stress, while for the less reactive type of clinker the effect was still less pronounced. An increased fineness of cement increased the effect of the gypsum-hemihydrate ratio, while a reduced total sulfate content reduced the observed yield stress.
Sep 22, 2016· The appropriate amount of gypsum depends on the content of C3A in the cement and that of SO3 in gypsum, and it also related to the fineness of cement and the content of SO3 in clinker. The amount of gypsum should account for 3%-5% of the cement's mass. If the content of gypsum exceeds the limit, it will lower the strength of cement and it can ...
Analysis of anhydrite gypsum effects on quality of cement. Analysis of anhydrite gypsum effects on quality of cement gypsum clinker cement 1INTRODUCTION of gypsum increases fineness target 3650 …
A comprehensive research project was undertaken to evaluate the effect of specific energy consumption (Ec) on variations of portland cement fineness measured by the Blaine test and sieve analysis. Amine and glycol-based grinding aids (GA) were
In Egypt, improving salt-affected soils is important for ensuring secure agricultural productivity. Gypsum is commonly used for the reclamation of saline-sodic and sodic soils. Soil column experiments were conducted to investigate the effect of gypsum, ground to varying degrees of fineness, on the reclamation of clayey saline-sodic soils.
Nov 17, 2014· The speed of reaction increases to a practical maximum with 100-mesh material. The effect of aglime fineness on speed of reaction is shown clearly in Figure 3. Figure 3. Effect of aglime fineness on speed of reaction. In each case illustrated in Figure 3, sufficient aglime was applied to neutralize the soil acidity to raise the soil pH to 7.0.
May 10, 2018· The effect of fineness and components of circulating fluidized bed combustion ash (CFBC ash) on compressive strength, setting time and fluidity of basic magnesium sulfate cement was studied. ... But gypsum crystal formation from the formula was unfavorable for compressive strength because it has thick crystal to destroy homogeneity.
Mar 12, 2011· Fineness: Finer the particle size of the hemihydrate« «faster is the set.Temperature:´ Little change occurs between 0*C to 50*C.´ If temperature of the plaster exceeds 50*C then gradual retardation occurs.´ As the temperature approaches 100*C, no reaction takes place.´ At higher temperature there is a tendency for the gypsum crystals ...
Oct 04, 2017· effect of gypsum fineness on the composition of saturation extract of a saline sodic soil khosla b. k.; abrol, i. p. soil science: march 1972 - volume 113 - issue 3 - ppg 204-206. article: pdf only ...
The effect of gypsum, ground to varying degrees of fineness, on the properties of two soils having exchangeable sodium percentages of 35 and 80, respectively, was studied in the laboratory.
Jan 26, 2016· The fineness of HPMC also has a certain impact on its water retention property. In general, as for HPMC of the same viscosity but different fineness, in the case of the same addition amount, the finer it is, the better the water retention effects will be.
Mar 01, 2003· Recognizing the effect of gypsum can enable the determination of appropriate cost-effective solutions. For example, admixtures such as sodium citrate may modify the crystal growth habit of gypsum. In the presence of sodium citrate, gypsum deposits in a short and stubby form rather than the normal needle-like form [7] .
May 01, 1982· The effect of gypsum, ground to varying degrees of fineness, on the properties of two soils having exchangeable sodium percentages of 35 and 80, respectively, was studied in the laboratory. Two types of gypsum were used, one having both upper and lower size limits of the grades defined (2.0-1.0, 1.0-0.6, 0.6-0.25, 0.25-0.125 and < 0.125 mm) and ...
After the gypsum has attained rigidity then they restrain the motion of the free ends preventing expansion. The magnitude of expansion mainly depends on the fineness of gypsum powder, the effect of water-gypsum ratio, the addition of retarders or accelerators, the added sand/lime paste. Effect of Fineness of Gypsum Powder:
Sep 01, 2008· The effects of clinker alkali content, aggregate reactivity, and sodium hydroxide (NaOH) solution concentration on the mortar expansion test results were also studied. In this study, high and low alkali portland cement clinkers were selected and ground with gypsum in a laboratory ball mill to three fineness levels: 300, 400, and 500 m 2 /kg ...
Jul 12, 2021· Its price varies with its accuracy and use. The price of gypsum powder is between $ 28.8-$ 403.6 per ton according to its whiteness and fineness. The cooked gypsum powder is about $ 28.8-$ 158.6 per ton, the cooking gypsum is about $ 72.1-$ 317.2 per ton, and the refined gypsum powder is about $ 201.8-$ 720.8 per ton.
Oct 22, 2008· A comprehensive research project was undertaken to evaluate the effect of specific energy consumption (Ec) on variations of portland cement fineness measured by the Blaine test and sieve analysis. Amine and glycol-based grinding aids (GA) were incorporated at various concentrations of 0.04, 0.06, and 0.08% of the cement weight. At Ec values lower than around 20 kWh/ton, test results …
The effects of clinker alkali content, aggregate reactivity, and sodium hydroxide (NaOH) solution concentration on the mortar expansion test results were also studied. In this study, high and low alkali portland cement clinkers were selected and ground with gypsum in a laboratory ball mill to three fineness levels: 300, 400, and 500 m2/kg (Blaine).
Oct 04, 2017· effect of gypsum fineness on the composition of saturation extract of a saline sodic soil khosla b. k.; abrol, i. p. soil science: march 1972 - volume 113 - issue 3 - …