Tìm thấy 20+ kết quả cho từ khóa "portland cement"
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C 150 Specification for Portland Cement 2. C 185 Test Method for Air Content of Hydraulic Cement Mortar 2. C 187 Test Method for Normal Consistency of Hydraulic Cement 2.
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Slump Loss of Portland Cement Concrete. To determine the slump loss of freshly mixed Portland Cement Concrete over a period of time.. This method is typically used for drilled shaft concrete. It may also be applicable in special circumstances as deemed necessary by the RCE..
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1.1 This test method covers determination of the fineness of portland cement as represented by a calculated measure of specific surface, expressed as square centimetres of total surface area per gram, or square metres of total surface area per kilogram, of cement, using the Wagner turbidimeter. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use.
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Standard Specification for Portland Cement 1.
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The paper is aimed to study the influences of three proportions of SRA (2%, 4%, and 7% by weight of cement) on drying shrinkage, strengths, water absorption, microstructure, and porosity of Portland cement mortar.. Details of the mixture compositions are showed in Table 2. *SRA = shrinkage reducing admixture. Drying shrinkage. After demoulding, each face of the prism was fixed with two demecs at a gauge length of 100 mm. Water absorption test.
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This standard is issued under the fixed designation C 151. the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. 1.1 This test method covers determination of the autoclave expansion of portland cement by means of a test on a neat cement specimen.. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use.
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TẠP CHÍ KHOA HỌC VÀ CÔNG NGHỆ, ĐẠI HỌC ĐÀ NẴNG - SỐ VAI TRÒ CỦA DIATOMITE PHÚ YÊN TRONG SẢN XUẤT XI MĂNG PORLAND TRÊN CƠ SỞ CLINKER LONG THỌ THE ROLE OF PHU YEN’S DIATOMITE IN PORTLAND CEMENT PRODUCTION BASED ON THE LONGTHO’S CLINKER Phạm Cẩm Nam Trần Ngọc Tuyền, Trần Thanh Tuấn Trường Đại học Bách khoa, Đại học Đà Nẵng Trường Đại học Khoa học, Đại học Huế TÓM TẮT Nhằm mục đích đa dạng hóa việc ứng dụng nguồn diatomite tại Việt Nam, diatomite Phú Yên được nghiên cứu để sử dụng trong công nghiệp sản
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C 150 Specification for Portland Cement 2.
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as follows:. r = density of test sample (for portland cement a value of 3.15 Mg/m 3 or 3.15 g/cm 3 shall be used),. e = desired porosity of bed of cement Note 5)..
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N OTE 4—As a guide for the initial trial mortar, the weight percent of water of the cement to produce the specified flow will be about 50 to 52 % for portland cement containing air-entraining material, and about 52 to 54 % for portland cement not containing air-entraining material.. 8.3 Determination of Flow—Determine flow of the mortar. mix in accordance with the procedure described in the Deter- mination of Flow Section of Test Method C 109, with the following exceptions:. 8.3.1 The table shall
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by pulver- izing portland-cement clinker, and usually containing cal- cium sulfate.. portland-pozzolan cement, n—a hydraulic cement consisting of an intimate and uniform blend of portland cement or portland blast-furnace slag cement and fine pozzolan pro- duced by intergrinding portland cement clinker and poz- zolan, by blending portland cement or portland blast-furnace slag cement and finely divided pozzolan, or a combination of C 219. intergrinding and blending, in which the amount of the pozzolan
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N OTE 3—This operation may be facilitated by placing the measure on a steady flat-surfaced support of lesser diameter than the measure while filling and wiping.. 10.1 Calculate the air content of the mortar from the following formula which is based on the batch proportions given in 9.1, taking the specific gravity of portland cement as 3.15 and of 20–30 standard sand as 2.65.
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C 151 Test Method for Autoclave Expansion of Portland Cement 2. C 187 Test Method for Normal Consistency of Hydraulic Cement 2. Summary of Test Method. 3.1 Sufficient water is added to the cement that is being tested to produce a paste of normal consistency. A specimen is molded from this paste and is tested for setting times by means of the Gillmore initial and final needles.
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C 109/C 109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. C 114 Test Methods for Chemical Analysis of Hydraulic Cement 2. C 219 Terminology Relating to Hydraulic Cement 2 C 305 Practice for Mechanical Mixing of Hydraulic Cement. C 1157 Performance Specification for Blended Hydraulic Cement [Metric] 2.
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Calcium sulfoaluminate cements Chất kết dính khơng xi măng Magnesite based cement (Non-Portland cement binders) Magnesium phosphate cement Geopolymer Bê tơng ít xi măng (Low cement concrete) Lean mix concrete Bê tơng cường độ siêu cao (Ultra high Fibre reinforced superplasticised silica fume concrete strength concrete) Oxygen enrichment of kiln atmosphere to enhance burning Những thay đổi trong quá trình sản xuất xi măng (Changes in Portland cement Belite cements manufacture) Alinite and Fluoralinite
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C 109 Test Method for Compressive Strength of Hydraulic- Cement Mortars (Using 2-in. C 115 Test Method for Fineness of Portland Cement by the Turbidimeter 3. C 138 Test Method for Unit Weight, Yield, and Air Content (Gravimetric) of Concrete 2. C 143 Test Method for Slump of Hydraulic Cement Con- crete 2. C 151 Test Method for Autoclave Expansion of Portland Cement 3. C 175 Specifications for Air-Entraining Portland Cement 4 C 185 Test Method for Air Content of Hydraulic Cement.
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With a number of government and industry organiza- tions, including the influential American Association of Portland Cement Manufacturers (later called the Portland Cement Associa- tion), all involved in the emerging cement industry in the early 1900s, ASTM offered the opportunity for balanced participation in creating uniform national specifications.. Working together, Committee C01 released its first standard in 1904: ASTM C9, Standard Specification for Cement.
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The cement concrete shall be of proportion 1:2:4 or as specified.. Cement shall be fresh Portland cement of standard specification. Concrete for one panel only shall be mixed in one lot. Alternate panels shall be laid on alternate days. The floor shall be laid in two layers. and any unevenness shall be removed by adding 1:2 cement sand mortar. The whole operation of laying shall be completed within 30 minutes. For coloured floor the thickness of the two layers shall be 19 mm and 6 mm.
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It can be summarised that the structural performance of fly ash beam depends partly on the source of fly ash and proportion of fly ash used to replace Portland cement. This paper investigated the long term performance of reinforced concrete beams in which locally sourced fly ash was used to replace original Portland cement at different proportions. Load deflection curves of the reinforced concrete beams.. Cracking pattern of the reinforced concrete beams..
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C 109/C 109M Test Method for Compressive Strength of Hydraulic Cement Mortars (Using 2-in. C 115 Test Method for Fineness of Portland Cement by the Turbidimeter 5. C 138 Test Method for Unit Weight, Yield, and Air Content. C 143 Test Method for Slump of Hydraulic Cement Con- crete 4. C 151 Test Method for Autoclave Expansion of Portland Cement 5. C 173 Test Method for Air Content of Freshly Mixed Concrete by the Volumetric Method 4.