Modification Tests to Optimize Compaction Quality Control of Granite Rockfill in Highway Embankments

Abstract

Particle size can be a problem in terms of rockfill compaction control methods, with little practical development of these techniques. The necessary fieldwork and laboratory tests were carried out to develop new quality control procedures for granite rockfill. This involved the revision of certain tests like the wheel-tracking or topographic settlement tests. More than 1100 in-situ density and moisture content measurements were performed for this research. In addition, more than 220 topographic settlements and 250 wheel-tracking carriage tests were carried out. The quality control processes were completed with 24 plate bearing tests. The results of granite rockfills were classified according to their use in the different areas of core or crown. Possible evidence of statistical correlations between compaction control tests was identified. An analysis of variance (ANOVA) was performed. When testing proved relationships between them, the replacement of one by the other was evaluated by deduction. Finally, the study suggests new procedures for compaction quality control of granite rockfill for its application in core and crown.

Modifications for Optimization the Compaction Quality Control in Core Slate Random Filling Embankments for Linear Infrastructures

“…The field and laboratory works were developed in order to elaborate new test procedures for a proposed compaction control in rocks. In this research, the modified compaction control tests according to Teijón-López-Zuazo et al [22] have been used, which modify the test procedures in the wheel-tracking test and in the topographic settlements. It has been proposed as a measurement criterion the settlement between the penultimate and last pass of the compacting roller, which in case of random filing core, should be less than 5mm.…”

“…It limits the maximum size to 800 mm for the operation of the compaction rollers. Teijón-López-Zuazo et al [2] show that in the construction of fillings with stone materials, compaction have limitations that avoid the optimal quality control.…”

“…Due to the large size of the explanations, the study has been particularized to the core zone, with a maximum layer thickness of 800mm. The tests carried out have been applied the revised procedures of the topographic settlement and the wheel impression test [2]. Among the different types of rock, research is focused on the family of slate rocks.…”

Modification Tests to Optimize Highway Construction in Crown of Slate Random Embankments with Compaction Quality Control

“…In this research, the modified compaction control tests according to Teijón-López-Zuazo et al [20] have been used, which modify the test procedures in the wheel-tracking test and in the topographic settlements. The study is particularized to the random filling of the crown with slate rocks.…”

Optimization of Compaction Quality Control in the Core of Random Fillings within Linear Infrastructures: Application to Metamorphic Slate Fillings

“…It considers that when determining the weight of the embankment Sustainability 2021, 13, 10957 2 of 19 from the specific gravity of the soil, care should be taken to include particles bigger than 20 mm and up to 60 mm in the density tests as they are often not included, although this can have a considerable effect on the specific weight determined. Teijón-López-Zuazo et al [2] show that in the construction of fillings with stone materials, compaction have limitations that avoid the optimal quality control.…”