SAP/nano-SiO₂ Composite Modified Alkali-Activated Concrete

Halves Shrinkage, Enhances Crack Resistance

A synergistic modification strategy using SAP and nano-SiO₂ significantly reduces autogenous shrinkage and cracking in alkali-activated concrete while mitigating strength loss, achieving improved dimensional stability.

Nana, Song · Bai, Yulei · Qian, Lan Ping · Biao, Li

Construction and Building Materials 2026

Specifications

Autogenous shrinkage reduced

{'zh': '', 'en': '54.84'} %

cracking area reduced

{'zh': '', 'en': '78.62'} %

Advantages

Optimizes pore distribution and generates additional hydration products that seal microcracks

Shrinkage prediction model validated with high accuracy