相关实验视频

Updated: Jun 26, 2025

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

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

Published on: March 7, 2025

公共填料对水泥稳定循环混合的道路性能的影响:机械性能,微观结构和耐用性

Ming Zhang¹, Chen Cheng¹, Kingsley Chiang¹

¹China State Construction Engineering (Hong Kong) Limited, Hong Kong 999077, China.

Materials (Basel, Switzerland)

|May 11, 2024

概括

本研究探讨在道路建设中使用公共填充 (PF) 作为天然聚合物 (NA) 的替代品. 结果显示,PF提高了道路材料的强度和耐用性,通过管理建筑垃圾,为环境提供了好处.

科学领域:

土木工程土木工程是指土木工程.
材料科学材料科学材料科学
环境工程环境工程

背景情况:

建筑垃圾给资源利用带来了重大挑战.
自然聚合物 (NA) 是道路建设的主要组成部分,导致枯竭.
公共填充 (PF) 是对聚合物替代的潜在可持续替代方案.

研究的目的:

调查用于道路应用的水泥稳定聚合物 (CSA) 中用PF取代NA的可行性.
综合评估含有PF的回收混合物的道路性能.
分析不同PF含量的CSA中的微观结构变化.

主要方法:

在不同的替换比率下用PF替换NA.
性能测试包括不受限制的压力强度,分裂强度,弹性模量,干燥收缩和抗性.
使用显微镜对CSA进行微结构分析.

主要成果:

与PF的水泥稳定循环混合物满足在二级道路上各种交通负载的强度要求.
在未受限制的压力强度和弹性模块中,在25%的PF含量下观察到的最佳性能.
微观结构分析显示了有益的C(N) -A-S-H,酸,Ca(OH) 2和CaCO3的形成,增强了紧性并减少了收缩裂.

结论:

在道路建设中,PF可以有效地被用作可持续的聚合物替代品.
结合PF可以改善道路材料的性能,减少干燥收缩和裂形成.
在道路建设中使用PF通过废物管理提供了显著的社会,经济和环境优势.

关键词:

机械性能机械性能机械性能微观结构的微观结构公共填充公共填充替换比率替换比率替换比率收缩的属性是收缩的属性.稳定稳定稳定稳定

更多相关视频

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior

Preparation of Aligned Steel Fiber Reinforced Cementitious Composite and Its Flexural Behavior

Published on: June 27, 2018

Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight

Advanced Self-Healing Asphalt Reinforced by Graphene Structures: An Atomistic Insight

Published on: May 31, 2022

相关概念视频

Additives and Fillers in Concrete

Additives and Fillers in Concrete

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...

Superplasticizers

Superplasticizers

Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...

Effects of Air-entrainment in Concrete

Effects of Air-entrainment in Concrete

Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...

Factors Affecting Workability

Factors Affecting Workability

The workability of concrete is a critical characteristic that influences the ease of mixing, handling, and finishing the concrete. It is affected by several factors including water content, aggregate properties, and admixtures like air entrainment. Water plays a fundamental role as it lubricates the concrete mix, facilitating easier movement and placement. However, the water requirement varies depending on the texture and shape of aggregates. Finer particles and angular, rough-textured...

Plasticizers

Plasticizers

Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...

Aggregate Cement Ratio

Aggregate Cement Ratio

The Aggregate Cement ratio refers to the weight of aggregate divided by the weight of cement in a concrete mix. Altering this ratio has profound effects on the concrete's properties. This ratio plays a pivotal role in determining the strength, workability, and durability of concrete. When the Aggregate Cement ratio is higher, the mix is leaner, meaning it has less cement paste to lubricate the aggregate, potentially making the concrete less workable. Such mixes, known as lean, enhance the...