[PDF][PDF] Use of Locally Available Soils on Subbase and Base Layers of Flexible Pavements

LR de Rezende, JC de Carvalho - TRANSPORTATION RESEARCH …, 2002 - academia.edu
LR de Rezende, JC de Carvalho
TRANSPORTATION RESEARCH RECORD, 2002academia.edu
Ribeiro de Rezende and Camapum de Carvalho Paper No. LVR8-1146 111 ing layer
(Figure 1a). Different base material components were distributed by segment (Tables 1 and
2). The fine soil used in Segment 1 consisted of a clay soil found at the construction site,
classified as MH (USCS), A-7-5 (AASHTO), and LG (lateritic clay) in the MCT classification.
To increase this soil's support capacity, 2% by weight of moisturized calcite lime of Type CH-
I was added (Segment 2). In Segment 3, stabilization was evaluated with the mixture of 80 …
Ribeiro de Rezende and Camapum de Carvalho Paper No. LVR8-1146 111 ing layer (Figure 1a). Different base material components were distributed by segment (Tables 1 and 2). The fine soil used in Segment 1 consisted of a clay soil found at the construction site, classified as MH (USCS), A-7-5 (AASHTO), and LG (lateritic clay) in the MCT classification. To increase this soil’s support capacity, 2% by weight of moisturized calcite lime of Type CH-I was added (Segment 2). In Segment 3, stabilization was evaluated with the mixture of 80% of crushed rocks, with grain sizes smaller than 9.5 mm, with 20% of fine soil. Experimental Highway 2, with a medium volume of traffic, consists of the connection between highways DF-440 and DF-001. Its length is 260 m, and it is composed of subbase and base compacted in the Proctor level of intermediate energy with bituminous hot mix overlay (Figure 1b). The construction is divided into three segments, with the characteristics shown in Table 1. Construction began in June 2000 with the subbase but was interrupted. The following year, construction resumed, and the base layers and hot mix overlay were completed in May 2001.
The fine soil used in Segments 1 and 2 consists of a clay soil found at the construction site, classified as MH (USCS), A-7-5 (AASHTO), and LG (lateritic clay) in the MCT classification. The difference between the two segments is in the procedure adopted
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