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相关概念视频

Ferrocement01:30

Ferrocement

216
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...
216
Additives and Fillers in Concrete01:29

Additives and Fillers in Concrete

115
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
115
Effect of Sea Water on Concrete01:22

Effect of Sea Water on Concrete

288
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...
288
Corrosion of Reinforcement01:27

Corrosion of Reinforcement

215
The corrosion of steel reinforcement within concrete is a process influenced by the material's inherent properties and external factors. The high pH level of around 13, provided by calcium hydroxide present in concrete, initially protects the steel reinforcement by promoting the formation of a passive iron oxide layer on its surface.
However, over time and under certain conditions like carbonation, chloride ingress, and cracking this protective state can be compromised. Steel has areas with...
215
Design Example: Sustainability in Concrete Building01:26

Design Example: Sustainability in Concrete Building

191
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
191
Pozzolans01:21

Pozzolans

147
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...
147

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相关实验视频

Updated: Jul 20, 2025

Production and Analysis of Sporosarcina pasteurii Biocement Bricks Using Custom 3D-Printed Molds for Unconfined Compression Tests
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使用鱼骨作为水泥材料的环保土壤稳定方法.

Maksym Avramenko1, Kazunori Nakashima2, Chikara Takano2

  • 1Graduate School of Engineering, Hokkaido University, Sapporo, Japan.

The Science of the total environment
|July 30, 2023
PubMed
概括
此摘要是机器生成的。

使用金枪鱼骨的酶诱导酸沉强化沙土高达6.05MPa. 与传统技术相比,这种环保方法还可以显著减少氨排放.

关键词:
酸化合物 (CPCs) 是一种酶诱导的酸盐沉 (EICPP) 是一种土地改善 土地的改善形态学 形态学 形态学改善土壤的方法鱼的骨头 鱼的骨头pH 的依赖性

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科学领域:

  • 地质技术工程 地质技术工程
  • 环境科学 环境科学
  • 材料科学 材料科学 材料科学

背景情况:

  • 传统的土壤改善方法,如尿溶性诱导石沉 (UICP) 被广泛使用.
  • 需要新的,环保的,无毒的土壤巩固技术.
  • 食品行业的废物,如金枪鱼骨,是有价值矿物质的潜在来源.

研究的目的:

  • 调查酶诱导酸盐沉 (EICPP) 的有效性,以巩固细砂和粗砂.
  • 探索使用金枪鱼骨作为EICPP的可持续和来源.
  • 为了比较EICPP与UICP在土壤强度和氨排放减少方面的表现.

主要方法:

  • 用EICPP将土壤样本 (细砂和粗沙) 与来自金枪鱼骨的溶液结合起来.
  • 在21天治疗后测量了无限制的压力强度 (UCS).
  • 采用X射线粉碎衍射 (XRD),扫描电子显微镜 (SEM) 和SEM能量分散式X射线光谱 (SEM-EDS) 来分析沉物的组成和形态.

主要成果:

  • 通过EICPP处理,细砂的UCS增加到6.05MPa,粗砂增加到4.3MPa.
  • XRD和SEM-EDS证实,沉物由酸化合物 (CPC) 组成,特别是布鲁希特,具有明显的晶体形态 (针状和花状).
  • 与UICP相比,氨排放量减少了85.7% - 97.5%.与UICP相比,氨排放量减少了85.7% - 97.5%.

结论:

  • 鱼骨是EICPP在土壤改善中的可行和丰富的和来源.
  • 使用鱼骨衍生溶液的EICPP有效地增强了酸盐土壤,并提供了显著的环境效益.
  • 这种新的EICPP方法为传统的土壤巩固方法提供了一个可持续的替代方案,减少废物和排放.