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effect fineness of gypsum

effect fineness of gypsum

Effect of gypsum fineness on the reclamation of sodic ...

1982-5-1  Our knowledge of the effect of the fineness of gypsum on sodic soil properties is inadequate. Based chiefly on physico- chemical considerations, it is often said that the finer the gypsum particles, the more effective they are for sodic soil reclamation (Kemper et al., 1975).

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Effect of gypsum fineness on the reclamation of sodic ...

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.

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Influence of gypsum fineness in the first hours of

2018-9-30  The fineness of the gypsum reduced the dissolution time of the gypsum and increased the time for secondary ettringite formation (from the sulphate absorbed by the C-S-H). This way, the fineness of the gypsum altered the hydration kinetics of the cementitious paste.

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EFFECT OF GYPSUM FINENESS ON THE

2017-10-4  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. Source. EFFECT OF GYPSUM FINENESS ON THE COMPOSITION OF SATURATION EXTRACT OF A SALINE SODIC SOIL. Soil Science113 (3):204

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Effect of gypsum fineness on the reclamation of sodic

Chawla, K. L. Abrol, I. P., 1982. "Effect of gypsum fineness on the reclamation of sodic soils," Agricultural Water Management, Elsevier, vol. 5(1), pages 41-50, May. Handle: RePEc:eee:agiwat:v:5:y:1982:i:1:p:41-50

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Effect of Gypsum Fineness on the Composition of

Effect of Gypsum Fineness on the Composition of Saturation Extract of a Saline Sodic Soil

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Effects of Gypsum Particle Size on Reclaiming Saline

2018-5-31  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. The soil used was obtained from Gelbana Village in the Sahl El-Tina Plain, Sinai Governorate, Egypt.

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Gypsum as a Construction Material- A Review of Recent ...

2016-5-19  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:

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Effects of gypsum formation on the performance of

2003-3-1  The effect of gypsum formation on expansion and mechanical degradation is difficult to quantify exactly because it is masked by the formation of ettringite during sulfate attack. Researchers have often attempted to isolate this effect by studying C3 A-free systems.

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(PDF) Effects of Gypsum as a Sulphur Fertilizer in

Gypsum Fibre Uniformity Fineness Fibre strength Adv. Agron., 10: 408–32. Doses length ratio (%) (µg inch-1) (000 lbs/ inch2) Malik, M.N. and Z.A. Baluch, 1978. Effect of environment and cultural (kg ha-1) (mm) practices on development and fibre properties of cotton.

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EFFECT OF GYPSUM FINENESS ON THE

2017-10-4  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. Source. EFFECT OF GYPSUM FINENESS ON THE COMPOSITION OF SATURATION EXTRACT OF A SALINE SODIC SOIL. Soil Science113 (3):204

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Effect of gypsum fineness on the reclamation of sodic

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 ...

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Effect of Gypsum Fineness on the Composition of

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 ...

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Gypsum as a Construction Material- A Review of Recent ...

2016-5-19  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:

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Effects of Gypsum Particle Size on Reclaiming Saline

2018-5-31  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.

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Effect of Calcium Carbonate Fineness on Calcium ...

These hydration and nucleation effects compensated for the strength reduction from decreased cementing components (i.e., dilution effect) when finer CC powders were used, while they did not overcome the strength reduction when coarser CC powder was used. On the other hand, increasing the amount of gypsum for a given CC content improved the ...

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Evolution of mechanical properties of gypsum in time

2011-3-8  tested gypsum samples water gypsum ratio 0.81 (Fig. 2). The last criterion is the fineness of grinding, where the tested gypsum is medium ground and the fineness of grinding is marked II in our case. Used water-gypsum ratio was 0.71 and corresponded with normal consistence of gypsum paste after standard ČSN 722301. TABLE I

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(PDF) Effects of Gypsum as a Sulphur Fertilizer in

Gypsum Fibre Uniformity Fineness Fibre strength Adv. Agron., 10: 408–32. Doses length ratio (%) (µg inch-1) (000 lbs/ inch2) Malik, M.N. and Z.A. Baluch, 1978. Effect of environment and cultural (kg ha-1) (mm) practices on development and fibre properties of cotton.

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Adsorption characteristics of water-reducing agents

2005-3-1  As shown in Fig. 3, the adsorbed amount of admixture on gypsum surface increased with the fineness of gypsum particles, which was especially evident at low dosage.The higher the specific surface area of gypsum particles, the higher the saturated adsorption amount of admixture was. When the specific surface area of gypsum particle exceeded 8000 cm 2 /g, fineness had a minor effect on the ...

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Properties of ideal model material (gypsum products)

2014-10-5  overall effect of contamination of gypsum products with moisture from the air during storage is a lengthening of the setting time. Colloidal systems such as agar and alginate retard the setting of gypsum products. Accelerators such as potassium sulfate are added to improve the surface quality of the set CaSO 4.2H20 against agar or alginate.

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EFFECT OF GYPSUM FINENESS ON THE

2017-10-4  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. Source. EFFECT OF GYPSUM FINENESS ON THE COMPOSITION OF SATURATION EXTRACT OF A SALINE SODIC SOIL. Soil Science113 (3):204

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Effect of Gypsum Fineness on the Composition of

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 ...

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Effect of fineness of high-alumina ground granulated ...

2020-1-22  The XRD results confirmed that gypsum formation was primarily responsible for the deterioration in the hardened cement matrices of mixtures with high-fineness ground granulated blastfurnace slag. In addition, the conversion of cementitious C–S–H to M–S–H (or M–C–S–H) also led to the severe deterioration in the mortar specimens ...

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Effects of Gypsum Particle Size on Reclaiming Saline

2018-5-31  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.

Get Price

Gypsum as a Construction Material- A Review of Recent ...

2016-5-19  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:

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Effect of Gypsum Amount in Cement on Fresh and Hard-

2020-5-31  der is the end product of heating gypsum powder to nearly180 0 C. This process is called calcining. It removes three-quarters of chemically bound water. This product is used in the production of gypsum board, gypsum plas-ter, and others. The fineness value of gypsum found was 98% sieved on No 100 (150µm) sieve.

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Effect of Gypsum-Hemihydrate Ratio in Cement on ...

1997-3-1  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.

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Evolution of mechanical properties of gypsum in time

2011-3-8  tested gypsum samples water gypsum ratio 0.81 (Fig. 2). The last criterion is the fineness of grinding, where the tested gypsum is medium ground and the fineness of grinding is marked II in our case. Used water-gypsum ratio was 0.71 and corresponded with normal consistence of gypsum paste after standard ČSN 722301. TABLE I

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Effect of particle size variations of gypsum bonded ...

2013-7-18  Effect of particle size variations of gypsum bonded investment powders on metallurgical quality of investment castings. ... The preliminary results illustrate that fineness of investment powders play an important role in determining the metallurgical quality of

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Materials Free Full-Text Effect of Gypsum on

The retarding effect is not obvious if the gypsum dosage is increased after the gypsum dosage is sufficient, which is consistent with the experimental results shown in Figure 4. In addition, the hydration of C 3 S can be indirectly promoted by the gypsum according to the Equations (3) and (4).

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EFFECT OF GYPSUM FINENESS ON THE

2017-10-4  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. Source. EFFECT OF GYPSUM FINENESS ON THE COMPOSITION OF SATURATION EXTRACT OF A SALINE SODIC SOIL. Soil Science113 (3):204

Get Price

Effect of fineness of high-alumina ground granulated ...

2020-1-22  The XRD results confirmed that gypsum formation was primarily responsible for the deterioration in the hardened cement matrices of mixtures with high-fineness ground granulated blastfurnace slag. In addition, the conversion of cementitious C–S–H to M–S–H (or M–C–S–H) also led to the severe deterioration in the mortar specimens ...

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introduction of fineness test of gypsum

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

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Effect of particle size variations of gypsum bonded ...

2013-7-18  Effect of particle size variations of gypsum bonded investment powders on metallurgical quality of investment castings. ... The preliminary results illustrate that fineness of investment powders play an important role in determining the metallurgical quality of

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Lecture No. : 4

2015-12-15  - An increase in fineness increases the amount of gypsum required for proper retardation because, in finer cement, more C 3 A is available for early hydration (due to the increase of its surface area). Fineness of cement is tested in two ways: (a) By sieving.

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FINENESS OF INDIGENOUS CEMENTS OF BANGLADESH

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 ...

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Properties of ideal model material (gypsum products)

2014-10-5  overall effect of contamination of gypsum products with moisture from the air during storage is a lengthening of the setting time. Colloidal systems such as agar and alginate retard the setting of gypsum products. Accelerators such as potassium sulfate are added to improve the surface quality of the set CaSO 4.2H20 against agar or alginate.

Get Price

Materials Free Full-Text Effect of Gypsum on

The retarding effect is not obvious if the gypsum dosage is increased after the gypsum dosage is sufficient, which is consistent with the experimental results shown in Figure 4. In addition, the hydration of C 3 S can be indirectly promoted by the gypsum according to the Equations (3) and (4).

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Effect of Calcium Carbonate Fineness on Calcium ...

Effect of Calcium Carbonate Fineness on Calcium Sulfoaluminate-Belite Cement Yeonung Jeong, Craig W. Hargis, Sungchul Chun, Juhyuk Moon; Affiliations Yeonung Jeong Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive

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Effect of the fineness of copper slag on the early ...

2019-4-25  The early hydration heat and hydration process, hydration products and strength of binders containing 20% copper slag with different fineness has been studied. The ordinary Portland cement is taken as the comparison sample. Results show that the replacement of cement in the same proportion copper slag can prolong its induction period, reduce its early hydration heat and prolong the hydration ...

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