Narrow Results

This study attempts to propose innovative multi-layer cement-based composites to have high impact resistance which could be used for runway. In this paper, the performances of two innovative multi-layer composite runway pavements using asphalt concrete-high strength concrete-cement-treated aggregate and asphalt concrete-high strength concrete-cement mortar in surface-base-subbase layer were evaluated under impact loads. ABAQUS/Explicit software was used to simulate loading condition and nonlinear stabilized runway pavement layers characteristics. In addition, a detailed parametric study was also carried out to explore the effects of the selected materials and load-related parameters in changing the performance of multi-layer composites. The findings of the study will be helpful to introduce protective multi-layer composite runway pavement and consequently to reduce the maintenance work of runway pavement.

This paper studies the mixture of cement mortar with a phase change material (PCM) and analyzes the changes in mechanical and physical performances. The experimental results demonstrate that an increase in PCM content results in decreases in consistency, compressive strength, bulk density and water retention. Therefore, these results can provide a reference for the application of phase change materials in practical engineering conditions.

Granite clast is industry garbage. For solving the problem about wasting of resources and environment pollution, the reuse of industry waste as a partial replacement of cement becomes a valuable discussion. The main objective of this study is to find the best mixing ratio of granite powder and slag powder replacing fly ash as the replacement of cement. The main work of this experimental program included the preparation and physical property test of the granite-based composite powder, the test of the working performance and mechanical property on granite-based composite powder (GBP) mortar. The experimental parameter was the mixing ratio of granite powder and slag powder. The GBP optimal components ratio is 60% of granite, 40% of slag and addition 1% of gypsum.