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相关概念视频

Types of Cement II01:22

Types of Cement II

92
Portland blast-furnace cement is made by blending Portland cement clinker with granulated blast-furnace slag, which accounts for 25 to 65 percent of the cement's weight. Despite its similarities to ordinary Portland (Type I) cement in terms of fineness and setting times, its early strength is lower, though it achieves comparable strength later on. It's particularly suited for mass concrete structures and marine environments due to its lower heat of hydration and superior sulfate...
92
Porosity in Cement Paste01:18

Porosity in Cement Paste

110
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...
110
Preplaced Aggregate Concrete01:29

Preplaced Aggregate Concrete

91
Preplaced aggregate concrete is ideal for construction environments that are not easily accessible. The process begins by properly wetting the gap-graded coarse aggregates to remove the dirt, then placing it in the form and compacting it. Voids are filled with a mortar mix pumped under pressure through slotted pipes. This mortar typically consists of Portland cement, pozzolan, fine aggregates, water, and a fluidizing aid. The pozzolan helps reduce bleeding and segregation while improving the...
91
Ferrocement01:30

Ferrocement

135
Ferro-cement is a distinctive construction material that represents an innovative variant of reinforced concrete, characterized by its unique composition and the method by which it is formed. Unlike standard reinforced concrete, which relies on larger steel bars for reinforcement, ferro-cement utilizes densely packed layers of mesh or fine rods, fully encased in cement mortar. This composition allows for the creation of structures that are significantly thinner and more flexible than their...
135
Types of Cement I01:21

Types of Cement I

100
Portland cement comes in several types, each with distinct properties and applications based on their chemical composition and hydration characteristics:
Type I (Ordinary Portland Cement) is widely used for general construction where special properties are not required. It has moderate sulfate resistance and heat of hydration.
Type II (Modified Cement) offers moderate resistance to sulfate attack and a lower rate of heat development compared to Type I. It is suitable for structures in...
100
Pozzolans01:21

Pozzolans

101
Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...
101

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相关实验视频

Updated: May 30, 2025

Production and Analysis of Sporosarcina pasteurii Biocement Bricks Using Custom 3D-Printed Molds for Unconfined Compression Tests
05:36

Production and Analysis of Sporosarcina pasteurii Biocement Bricks Using Custom 3D-Printed Molds for Unconfined Compression Tests

Published on: March 7, 2025

185

编织的水泥泥泥

Chengji Xu1, Rijiao Yang1, Rongjia Wen1

  • 1College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China.

Advanced materials (Deerfield Beach, Fla.)
|January 27, 2025
PubMed
概括
此摘要是机器生成的。

研究人员开发了一种新的颗粒聚合物策略,用于制造可伸缩水泥泥. 这一创新使得织成为可能,形成强大,坚固的结构织品,超越3D打印能力.

关键词:
建设建设建设建设建设.跨穿透结构的跨穿透结构颗粒-聚合物凝聚的凝聚.编织 编织 编织 编织

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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.
  • 纳米技术纳米技术

背景情况:

  • 自新石器时代以来,编织是一种基本的建筑技术,但在现代混凝土建筑中不适用.
  • 传统的混凝土施工方法,如成型造,接和3D打印,在创建复杂的,交织的结构方面存在局限性.

研究的目的:

  • 开发一种用于制造可伸缩水泥泥的新方法.
  • 为了使织能够创建先进的结构织品.
  • 通过编织结构增强水泥材料的机械性能.

主要方法:

  • 提出了一种利用静电,桥接,协调和键相互作用的粒子-聚合物凝聚策略.
  • 水泥丝被制造成可伸缩的泥.
  • 诸如曲,结结,卷轴,绕线和交织等技术被用来创建编织的水泥结构,包括中国结.

主要成果:

  • 该研究成功制造了可拉伸式水泥泥,并证明了超越传统方法的水泥编织.
  • 通过编织结构实现了三轴交叉穿透结构.
  • 与3D打印结构相比,间层强度和性分别大约提高了208.5%和676.5%,显著提高.

结论:

  • 新的颗粒聚合物凝聚策略使得水泥编织成为可能,这是混凝土建筑的突破.
  • 织造水泥结构表现出优越的强度和性,为多方向应用提供了潜力.
  • 这项研究为先进的水泥材料和建筑技术开辟了新的途径.