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相关概念视频

Mortar Properties01:17

Mortar Properties

549
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
549
Mortar01:29

Mortar

688
Mortar, a mixture of Portland cement, hydrated lime, sand, and water, is a crucial binding material in construction. Its primary function is to join masonry units together, filling gaps and ensuring a uniform distribution of weight across the structure. This helps in preventing potential weaknesses. Mortar also serves as a protective barrier against environmental elements such as water and wind, thereby safeguarding the interior of the structure. It also compensates for surface irregularities...
688
Strength of Cement01:20

Strength of Cement

712
Strength tests for cement are not performed directly on neat cement paste due to difficulty in obtaining consistent, reliable specimens. Instead, cement is typically tested in the form of cement-sand mortar.
For compressive strength tests, ASTM C 109-05 standards prescribe a cement-sand mix ratio of 1:2.75 and a water/cement ratio of 0.485 for making 2-inch cubes. These cubes are mixed, cast, and cured in saturated lime water at 23°C until testing. Flexural strength testing, outlined in...
712
Mortar Joints in Brick Masonry01:25

Mortar Joints in Brick Masonry

498
Mortar joints play a critical role in brick masonry, filling the spaces between brick to bind them together and provide structural integrity and strength. The thickness of these joints is variable, typically ranging from less than one-fourth inch to over half an inch, based on structural needs and specific applications.
The process of joint tooling is implemented as the mortar begins to harden. This technique involves compacting and shaping the mortar to enhance both the appearance and the...
498
Mortar Joint Deterioration in Masonry01:13

Mortar Joint Deterioration in Masonry

392
Mortar joint deterioration is a significant concern in masonry structures, with water accumulation in the joints leading to damage from freeze-thaw cycles. The repeated expansion of water during freezing and its melting during thawing develop and propagate cracks in the masonry joints. Eventually, this leads to the spalling of mortar from the joints, loosening masonry units and weakening the structure. The deteriorated mortar joints are also vulnerable to moisture intrusion into the walls.
The...
392
Bonding and Strength of Aggregate01:12

Bonding and Strength of Aggregate

548
The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
548

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Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior
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优化和性能评估使用颗粒包装技术的多元组件粘合剂型砂.

Vanga Renuka1, Sarella Venkateswara Rao1, Tezeswi Tadepalli1

  • 1Department of Civil Engineering, National Institute of Technology Warangal, Warangal 506004, Telangana, India.

Materials (Basel, Switzerland)
|March 14, 2026
PubMed
概括

这项研究优化了多组分结合剂 (MCB) 和聚合物分级,以获得更强,更耐用的水泥系统. 优化的混合物减少能源和二氧化碳排放,提高建筑材料的可持续性.

关键词:
D-最佳的混合物设计.干燥 收缩 收缩 干燥生态效率高的地砂.多元组件粘合剂多元组件粘合剂包装密度 包装密度 包装密度补充的混凝土材料 补充的混凝土材料

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科学领域:

  • 材料科学 材料科学 材料科学
  • 土木工程 土木工程是指土木工程.
  • 可持续建筑 可持续建筑

背景情况:

  • 多元组件粘合剂 (MCB),将普通波特兰水泥 (OPC) 与补充水泥材料 (SCM) 结合起来,对于可持续和高性能水泥系统至关重要.
  • 像飞灰,渣,甲和二氧化烟雾这样的SCM提供从微米到次微米尺度的粒子大小优势.

研究的目的:

  • 整合先进的混合物设计和颗粒包装技术,以优化MCB组成和聚合物分级.
  • 为了提高包装密度,机械强度,耐用性,并减少水泥材料对环境的影响.

主要方法:

  • 使用D-最佳混合设计 (DOD) 来将粘合剂成分与湿封装密度 (WPM) 相关联.
  • 采用了修改后的Toufar模型 (MTM) 来优化细聚合物的分级,以获得最大的包装密度.
  • 对机械强度,pozzolanic反应性,毛细血管水吸附性和干燥收缩性进行评估的优化砂混合物.

主要成果:

  • 优化的MCB和聚合物分级显著改善了包装密度和pozzolanic活动.
  • 在优化的砂混合物中观察到增强的强度和耐久性性能.
  • 与C100相比,基于CFGMS的系统显示能耗 (35-40%) 和二氧化碳排放 (34-48%) 显著减少.

结论:

  • 结合剂成分和聚合物分级的综合优化有效地提高了水泥系统的性能.
  • 在MCB中使用SCM是一种可行的策略,可以提高材料性能并实现显著的环境效益.
  • 优化系统为传统水泥提供了可持续的替代方案,减少了能源消耗和碳足迹.