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Cement clinker, cement composition, and manufacturing method of cement clinker

A cement clinker and quality technology, applied in cement production, solid waste management, sustainable waste treatment, etc., can solve the problems of high heat of hydration, limited usage, increase of A amount, etc., and achieve the effect of low heat of hydration

Active Publication Date: 2022-07-12
SUMITOMO OSAKA CEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, if these wastes and by-products are used, C in the mineral composition of cement clinker 3 The amount of A increases, resulting in a higher heat of hydration
Currently, when using the above-mentioned waste and by-products as raw materials for cement clinker, the amount of use is limited

Method used

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  • Cement clinker, cement composition, and manufacturing method of cement clinker
  • Cement clinker, cement composition, and manufacturing method of cement clinker

Examples

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Embodiment

[0110] Hereinafter, the present invention will be described in more detail with reference to Examples. However, the present invention is not limited in any way by the following examples.

[0111] 1. Measurement and evaluation

[0112] 1-1. Clinker composition

[0113] The chemical composition (content ratio of each component) in the cement clinker of Examples and Comparative Examples is based on JIS R5204:2019 "Fluorescent X-ray Analysis Method for Cement" and JCAS I-53:2018 "Quantitative Method for Trace Components in Cement" Determination. Mineral composition depends on the obtained CaO, SiO 2 , Al 2 O 3 and Fe 2 O 3 The mass ratio of , was calculated using the following Bogue formula. The results are shown in Table 1.

[0114] C 3 S=(4.07×CaO)-(7.60×SiO 2 )-(6.72×Al 2 O 3 )-(1.43×Fe 2 O 3 )

[0115] C 2 S=(2.87×SiO 2 )-(0.754×C 3 S)

[0116] C 3 A=(2.65×Al 2 O 3 )-(1.69×Fe 2 O 3 )

[0117] C 4 AF=3.04×Fe 2 O 3

[0118] In addition, the value on...

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Abstract

The present invention provides a cement clinker and a cement composition capable of reducing heat of hydration and excellent in short-term strength development. In cement clinker, C calculated by Bogue's formula 3 The ratio of S is 50 to 75% by mass, and C calculated by Bogue's formula 2 The ratio of S is 5 to 25% by mass, and C calculated by Bogue's formula 3 A and C 4 The total proportion of AF is 15 to 22 mass %, including MgO and TiO 2 , MnO, and ZnO, which satisfy the following formula (1). C Mg‑C3A ×C Ti‑C3A ×C Mn‑C3A ×C Zn‑C3A ≤0.0010...(1) In formula (1), C Mg‑C3A means C 3 MgO content (mass %) in A, C Ti‑C3A means C 3 TiO in A 2 The content rate (mass %), C Mn‑C3A means C 3 MnO content (mass %) in A, C Zn‑C3A means C 3 The content rate (mass %) of ZnO in A.

Description

technical field [0001] The invention relates to a cement clinker and a cement composition, in particular to an ordinary Portland cement. Background technique [0002] From the viewpoint of suppressing cracks in concrete, a cement composition having a low heat of hydration is required. For example, according to "General Specification for Civil Engineering (Revised in April 2019)" (Kanto Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism), Part 2 "Materials", Section 6 "Cement and Mixed Materials", 2-2-6- 2 "Cement", Table 2-2-18 "Quality of Ordinary Portland Cement", the hydration heat of cement is 350 J / g or less in 7-day wood age and 400 J in 28-day wood age Management target value below / g. [0003] In recent years, various wastes and by-products containing a large amount of Al, such as coal ash and construction soil, have been used as cement raw materials. However, if these wastes and by-products are used, C in the mineral composition ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/24C04B7/06C04B7/04C04B7/21C04B7/36C04B7/44
CPCC04B7/24C04B7/06C04B7/04C04B7/21C04B7/36C04B7/44C04B7/02
Inventor 清水准山田曜山县亨介佐藤友树那须英由希
Owner SUMITOMO OSAKA CEMENT CO LTD
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