IMPORTANT- READ THESE TERMS CAREFULLY BEFORE ENTERING THIS ASTM PRODUCT.īy purchasing a subscription and clicking through this agreement, you are entering intoĪ contract, and acknowledge that you have read this License Agreement, that you understand The proposed cement slurry formulation can better meet the requirements of mechanical properties and durability characteristics of SFP. They allow the fresh cement slurry to fully penetrate the asphalt mixture skeleton with a lower water–cement ratio, improving engineering properties of SFP. It is concluded that chemical admixtures are essential requirements for the production of high performance cement slurry. This reduces the cracks on the interface between asphalt mixture skeleton and hardened cement paste when the ambient temperature changes. At the micro level, the fiber-like hydrated products between SBR latex and cement particles improve the flexibility of hardened cement paste. SBR latex improves the stability of fresh cement slurry and enhances the flexibility of hardened cement paste to reduce the cracks in SFP. Additionally, styrene butadiene rubber (SBR) latex is an effective flexible admixture for cement slurry, and its dosage of 2 % by mass of cement is proposed. Also, the optimum water–cement ratio of 0.6 for cement slurry is proposed, at which the fresh cement slurry can fully penetrate into asphalt mixture skeleton, and improve the engineering properties of SFP. Polycarboxylene-based superplasticizer is a desirable penetrant with the dosage of 1 % by mass of cement. Results indicate that the penetrant has a significant effect on the fluidity of cement slurry, improving the flowability of cement slurry. To better balance the flexible and rigid characteristics between the asphalt mixture skeleton and hardened cement paste in SFP, a further understanding of its cement slurry formulation design is required. SFP consists of a porous asphalt mixture skeleton with 25 %–35 % voids, filled with selected cement slurry. Semi-flexible pavement (SFP) combines the best features of both flexible asphalt and rigid cement concrete pavement.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |