Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Curing of Concrete01:20

Curing of Concrete

81
The hydration of cement takes place within the water-filled capillary pores. However, environmental elements can disrupt this process by evaporating water from the concrete surfaces. Sealed concrete with a water-cement ratio below 0.5 experiences self-desiccation, leading to water loss. The water loss in concrete is mitigated by curing. This technique involves keeping the concrete saturated to maintain the necessary temperature and moisture conditions, to optimally fill the spaces in the cement...
81
Curing Methods01:26

Curing Methods

64
Concrete members with a small surface-to-volume ratio are cured by oiling and moistening the forms before casting the concrete member. These forms can be left in place for a prolonged period to prevent moisture loss, and can be wetted if made of a material suitable for wetting. If the forms are removed early, the concrete member is moistened and covered with polythene sheets to maintain moisture. For large horizontal concrete surfaces exposed to dry weather, a temporary covering is suspended...
64
Hydration of Cement01:24

Hydration of Cement

171
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
171
Design Example: Managing Concrete Workability01:14

Design Example: Managing Concrete Workability

65
This example deals with managing the workability of concrete for a raft foundation project under hot weather conditions. Workability is crucial for ensuring the concrete is easy to place, compact, and finish. In this scenario, a slump test — a common method to measure the workability of fresh concrete — initially indicated low workability. This was attributed to the rapid water loss from the concrete mix, exacerbated by the high temperatures causing the course aggregates to heat up.
65
Retarders01:19

Retarders

57
Retarders are chemical admixtures designed to extend the setting time, which is especially useful when there is a delay in sequential concrete pours to prevent cold joints and to achieve a cohesive structure. Retarders, when used in appropriate amounts, can also enhance the architectural appearance of exposed aggregate finishes.
The function of retarders is to delay the setting of concrete, and this effect can be measured using a penetration test. The retardation process involves adding...
57
Porosity in Cement Paste01:18

Porosity in Cement Paste

96
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
96

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

IP-LC-MS/MS-Based Identification of Candidate TPL2 (MAP3K8)-Associated Proteins in Porcine PK-15 Cells.

Journal of mass spectrometry : JMS·2026
Same author

Cattle and human organoids reveal 2.3.4.4b H5N1 cross-species transmission potential and neuraminidase-specific neutralizing antibodies in humans.

Nature communications·2026
Same author

Self-Sustaining Lactate Depletion Nanoplatform Remodels Tumor Microenvironment and Augments Synergistic Photodynamic/Photothermal/Chemodynamic/Starvation Therapy for Eradication of Colon Cancer.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Durability analysis of alkali-activated steel slag-GGBS-coal gangue composite mixtures.

Scientific reports·2026
Same author

Multiple leiomyosarcoma of great saphenous vein with lung metastasis.

Journal of cardiothoracic surgery·2026
Same author

The genetic evidence linking instant coffee and carpal tunnel syndrome: A Mendelian randomization study.

Medicine·2026

相关实验视频

Updated: May 14, 2025

Sandy Soil Improvement through Microbially Induced Calcite Precipitation MICP by Immersion
06:27

Sandy Soil Improvement through Microbially Induced Calcite Precipitation MICP by Immersion

Published on: September 12, 2019

9.3K

红色泥基地质聚合物的治愈模式优化.

Zhongping Yang1,2,3, Shuang Yang1, Xuyong Li1

  • 1School of Civil Engineering, Chongqing University, Chongqing 400045, China.

Langmuir : the ACS journal of surfaces and colloids
|April 28, 2025
PubMed
概括

优化红泥地质聚合物 (RMG) 的固化条件是关键. 温度和湿度高达24小时可显著增强强度,并确定了优越机械性能的最佳模式.

更多相关视频

Additive Manufacturing of Functionally Graded Ceramic Materials by Stereolithography
06:53

Additive Manufacturing of Functionally Graded Ceramic Materials by Stereolithography

Published on: January 25, 2019

14.0K
Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
05:52

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Published on: June 2, 2022

2.8K

相关实验视频

Last Updated: May 14, 2025

Sandy Soil Improvement through Microbially Induced Calcite Precipitation MICP by Immersion
06:27

Sandy Soil Improvement through Microbially Induced Calcite Precipitation MICP by Immersion

Published on: September 12, 2019

9.3K
Additive Manufacturing of Functionally Graded Ceramic Materials by Stereolithography
06:53

Additive Manufacturing of Functionally Graded Ceramic Materials by Stereolithography

Published on: January 25, 2019

14.0K
Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal
05:52

Resource Recycling of Red Soil to Synthesize Fe2O3/FAU-type Zeolite Composite Material for Heavy Metal Removal

Published on: June 2, 2022

2.8K

科学领域:

  • 材料科学 材料科学 材料科学
  • 地质化学 地质化学
  • 土木工程 土木工程是指土木工程.

背景情况:

  • 目前的红泥地质聚合物 (RMG) 固化遵循水泥科学,由于不同的强度机制而不适合.
  • 地质聚合需要高度,高温和高湿度,与水泥水化不同.

研究的目的:

  • 研究固化温度,湿度和持续时间对RMG机械性能的影响.
  • 通过响应表面分析,确定红色泥基地质聚合物的最佳固化模式.

主要方法:

  • 基于红泥的地质聚合物 (RMG) 标本经历了各种固化方案.
  • 机械性能使用无限制压力 (UCS) 进行评估.
  • 使用MIP,SEM,XRD和FTIR分析了微结构,相组合和化学结构.

主要成果:

  • 增高的固化温度 (40-80°C) 增强了RMG的强度,但过度的热量导致了裂纹.
  • 湿度固化 (80%RH) 与70%RH相比,改善了UCS的19.8%,缓解了裂和毛孔.
  • 强度随着固化时间增加到24小时,然后在48小时内由于孔隙生成而急剧下降.

结论:

  • 固化温度,湿度和持续时间显著影响RMG机械性能.
  • 在73.8°C和78.9%的RH下确定了21.5小时的最佳固化时间.
  • 了解这些参数对于开发有效的红泥基地质聚合物应用至关重要.