T/JSJTQX 43-2023 Road surface pavement of cement stabilized gravel base layer without vibration pressing construction technical guideline

Scope

Scope: This document specifies the raw material requirements, mix composition design, and construction of cement-stabilized gravel base courses without vibratory compaction for highway pavements, as well as construction quality control. This document is applicable to the construction of cement-stabilized gravel base courses under conditions restricting the use of vibratory compaction. Main technical content: The main technical content of the "Technical Guidelines for the Construction of Cement-Stabilized Gravel Base Courses without Vibratory Compaction for Highway Pavements" is as follows: Currently, cement-stabilized gravel mixtures are widely used in the construction of pavement base courses and subbase courses, which is inseparable from the advantages of cement-stabilized gravel mixtures themselves. Compared with flexible base materials, cement-stabilized gravel mixtures have high strength, high bearing capacity, good water stability, and strong slab formation; they can make rational use of local sand and gravel materials to save construction costs; and over the years, design and construction units have accumulated many successful experiences. However, due to the need for vibratory compaction during the construction of traditional cement-stabilized gravel mixtures and the large vibration force used in vibratory compaction, the construction quality of cement-stabilized gravel base courses is difficult to guarantee in areas with special requirements for vibratory compaction, such as ancient buildings, old buildings, bridge and culvert areas, underground void areas, and underground karst areas. The "Technical Guidelines for the Construction of Cement-Stabilized Gravel Base Courses without Vibratory Compaction for Highway Pavements" proposes a technology for constructing cement-stabilized gravel base courses under static compaction conditions alone, which can effectively guarantee the compaction density of cement-stabilized gravel base courses under conditions restri

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