GB/T 39712-2020 in English

VALID

Sulphoaluminate cement for marine rapid construction

Issued on:2020-12-14
Implemented on:2021-11-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $160.00
$156.00

Standard No:	GB/T 39712-2020
Document status:	VALID
Title in English:	Sulphoaluminate cement for marine rapid construction
Title in Chinese:	快速施工用海工硫铝酸盐水泥
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-12-14
Implemented on:	2021-11-01
ICS Classification:	91.100.10-Cement. Gypsum. Lime. Mortar
Chinese Classification:	Q11-Cement
Professional Classification:	GB-National Standard
Related Keywords:	marine sulphoaluminate cement sulphoaluminate cement grade ordinary sulphoaluminate cement rapid construction rapid construction introduction analysis
Related Topics:	How to Quickly Test Sulfate Borate fast in water portable permanganate fast Sodium sulfate for industrial use fast dissolving aluminum Rapid sulfur meter Offshore Rapid Dissolution of Aluminum Rapid Nucleic Acid Purification Rapid Nucleic Acid Purification fast entry Fast salinity measurement cement content fast rapid purification of nucleic acids Liquefied Petroleum Gas Total Sulfur Rapid salt rapid hydrolysis aluminum sulfate ph acid value fast Copper sulfate rapid detection volatile acid fast sewage cod fast salinity fast sea salinity season Quick Salt Spray Test Seawater Sulfate Seawater Sulfate fast salinity meter Rapid detection of sulfur content Seawater Sulfate Rapid detection of persulfate salt fast Sodium Sulfate Rapid Determination Method How does aluminum dissolve quickly Aluminum content in water quickly Water breaks down quickly Industrial fast cod Use of fast dehydrator How to Melt Aluminum Fast Aluminate cement GBT39712 GB/T 39712-2020 salt iodine fast Sulphoaluminate cement Marine cement Aluminophosphate cement The functions and uses of sulfate Sulfates in seawater form sulfides Sulfalumina cement standard gb20472 aluminate cement execution The latest national standards for aluminate cement Artificial seawater formula sewage plant sulfate Rapid detection method of potassium aluminum sulfate Sulfuric acid engineering design Salt spray rapid test Rapid detection method of sulfuric acid mist Sulfate discharge into the sea simulate seawater Aluminate cement packaging new Rapid detection method of aluminum ammonium sulfate aluminum sulfate execution

《GB/T 39712-2020快速施工用海工硫铝酸盐水泥》由TC184（全国水泥标准化技术委员会）归口，主管部门为中国建筑材料联合会。

Introduction

Analysis of the core content of the standard

GB/T39712-2020 standardizes for the first time the technical system of marine sulphoaluminate cement for rapid construction. This material has the characteristics of 4h rapid hardening (compressive strength ≥15MPa) and high corrosion resistance (chloride ion diffusion coefficient ≤0.75×10^-12 m²/s), and is particularly suitable for rapid repair scenarios of marine engineering projects such as tidal areas and cross-sea bridges.

Comparison of key technical indicators

Performance parameters	52.5 grade	62.5 grade	Ordinary sulphoaluminate cement
4h compressive strength (MPa)	≥15.0	≥15.0	≥10.0
28d chloride ion diffusion coefficient (×10^-12m²/s)	≤0.75		≤2.0
Anti-seawater erosion coefficient	≥1.00		≥0.90

Material component innovation

The standard stipulates that sulfoaluminate cement clinker (Al₂O₃≥30%) and composite mineral admixtures (slag + silica fume/limestone) must be used for synergistic modification, among which:

Gypsum must be of Class A grade 2 or above in GB/T5483
Silica fume must meet the activity index requirements of GB/T27690
The CaO content of limestone is strictly limited to ≥46%

Engineering application cases

The Hong Kong-Zhuhai-Macao Bridge artificial island connection section uses this cement to achieve:

Complete structural repair within 4 hours during the tidal window period

28d chloride ion penetration depth reduced by 40%

Structural service life increased to more than 50 years

Implementation suggestions

1. Construction control points: 165-175mm mortar fluidity must be used to control the water-cement ratio, and the order of adding materials must be strictly followed according to water→sand→cement

2. Quality acceptance: It is recommended to increase the 7d seawater erosion resistance coefficient on-site sampling, and the acceptance standard is controlled according to K≥0.95

3. Storage requirements: After opening, it must be used within 48 hours to avoid moisture absorption and resulting in a decrease in early strength performance

More samples: DL/T 368-2010 DL/T 5154-2012 YD/T 3934-2021

Sample only — not a preview of GB/T 39712-2020

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