Lightweight high-strength high-toughness cement-based composite material and preparation method thereof

By combining cementitious materials with silica aerogel, lightweight, high-strength, and high-toughness cement-based composite materials were prepared, solving the problem of low compressive strength of lightweight aggregates in high-toughness cement-based materials, and realizing the material's lightweighting, thermal insulation integration, and improved durability.

CN121554249APending Publication Date: 2026-02-24INNOVATION CENTER OF YANGTZE RIVER DELTA ZHEJIANG UNIVERSITY
3 Cites 1 Cited by

Patent Information

Application Number
CN202610076842.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-21
Publication Date
2026-02-24

AI Technical Summary

Technical Problem

Existing lightweight aggregates have problems such as low compressive strength and high proportion of lightweight aggregates in the preparation of lightweight high-toughness cement-based materials, making it difficult to achieve precise control over the high-toughness cement-based materials.

Method used

A lightweight, high-strength, and high-toughness cement-based composite material is prepared by combining cementitious materials, fine aggregates, water, water-reducing agents, synthetic fibers, and silica aerogel through stirring and mixing. The nanoscale porous structure and nano-effect of the aerogel are used to optimize the interface structure and synergistically improve the compressive strength and toughness of the material.

Benefits of technology

It significantly reduces material density while maintaining good mechanical strength and toughness, possesses excellent thermal insulation performance and durability, achieves lightweight structure and integrated thermal insulation, and improves building energy efficiency.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a lightweight high-strength high-toughness cement-based composite material and a preparation method thereof. The composite material is prepared from the following components in parts by mass: 1000 parts of a cementing material, 200-400 parts of fine aggregate, 150-250 parts of water, 10-30 parts of a water reducing agent, 14-23 parts of synthetic fiber and 10-30 parts of silicon dioxide aerogel. The preparation method comprises the following steps: mixing and stirring 1000 parts of the cementing material, 200-400 parts of the fine aggregate and 10-30 parts of the silicon dioxide aerogel to obtain a dry material, then adding 10-30 parts of the water reducing agent and 150-250 parts of the water into the dry material, mixing and stirring to obtain neat paste, and finally adding 14-23 parts of the synthetic fiber into the neat paste while stirring, and mixing and stirring to obtain slurry. The light-weight, high-strength and high-toughness cement-based composite material is few in component variety, simple in preparation method, low in volume weight, high in strength and large in ultimate tensile strain, and the problems that a traditional light-weight and high-toughness cement-based material is large in light-weight aggregate mixing amount, low in strength, poor in ductility and stability and the like are solved; and the method has a wide application prospect in infrastructures such as high-rise building structure facades and large-span bridge structure pavement layers.
Need to check novelty before this filing date? Find Prior Art