Innovative high-performance cement treated crushed stones as rolled concrete
Abstract The main causes of poor performance of cement-treated crushed stones (CTCS) pavement layers are material-related heterogeneity, porosity, and brittle cementitious matrix, leading to fast fatigue degradation. Seeking to improve CTCS mechanical properties and structural response it was studi...
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| Format: | Article |
| Language: | English |
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Instituto Brasileiro do Concreto (IBRACON)
2024-01-01
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| Series: | Revista IBRACON de Estruturas e Materiais |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952024000500208&tlng=en |
| _version_ | 1797361130441539584 |
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| author | Andréia Posser Cargnin José Tadeu Balbo Liédi Legi Barianni Bernucci |
| author_facet | Andréia Posser Cargnin José Tadeu Balbo Liédi Legi Barianni Bernucci |
| author_sort | Andréia Posser Cargnin |
| collection | DOAJ |
| description | Abstract The main causes of poor performance of cement-treated crushed stones (CTCS) pavement layers are material-related heterogeneity, porosity, and brittle cementitious matrix, leading to fast fatigue degradation. Seeking to improve CTCS mechanical properties and structural response it was studied different grading curves such as DER-SP, EN 14227-1 CBGM 2 and RCC-ACI were studied. The aim of the laboratory study was to rank and select among the classical particle size distribution models like Talbot & Richart, and analytical models as compressible packing model – CPM, the best grading curve which was capable of producing mixtures with the best aggregate interlocking and improved mechanical resistances. The effect of cement content (4% and 5%) as well as the potential of using silica fume in suspension (percentages of 5, 7 and 10% of cement mass) to improve the interfacial transition zone were evaluated. It was found that CPM is a powerful tool for aggregates ranking aggregates and designing well-graded mixtures like CTCS; the CBGM 2 EN 14227-1 mean curve achieved the best packing density. The effect of increasing the cement content from 4 to 5% in terms of mechanical strength has the same result as the addition of 7% of silica fume in mixtures with 4% cement. Eventually, mixtures with 5% cement and 10% silica fume showed modulus of elasticity similar to traditional CTCS; nonetheless, the HP-CTCS (high performance CTCS) split tensile strength was significantly higher (about 28%), leading to a lower Et,sp/fct,sp relationship, which is a highly positive outcome to improve mechanical durability of this innovative dry compacted concrete. |
| first_indexed | 2024-03-08T15:49:32Z |
| format | Article |
| id | doaj.art-30965c9d538e4f2182eb7143d4596e96 |
| institution | Directory Open Access Journal |
| issn | 1983-4195 |
| language | English |
| last_indexed | 2024-03-08T15:49:32Z |
| publishDate | 2024-01-01 |
| publisher | Instituto Brasileiro do Concreto (IBRACON) |
| record_format | Article |
| series | Revista IBRACON de Estruturas e Materiais |
| spelling | doaj.art-30965c9d538e4f2182eb7143d4596e962024-01-09T07:40:40ZengInstituto Brasileiro do Concreto (IBRACON)Revista IBRACON de Estruturas e Materiais1983-41952024-01-0117510.1590/s1983-41952024000500010Innovative high-performance cement treated crushed stones as rolled concreteAndréia Posser Cargninhttps://orcid.org/0000-0003-1568-2756José Tadeu Balbohttps://orcid.org/0000-0001-9235-1331Liédi Legi Barianni Bernuccihttps://orcid.org/0000-0002-4768-0993 Abstract The main causes of poor performance of cement-treated crushed stones (CTCS) pavement layers are material-related heterogeneity, porosity, and brittle cementitious matrix, leading to fast fatigue degradation. Seeking to improve CTCS mechanical properties and structural response it was studied different grading curves such as DER-SP, EN 14227-1 CBGM 2 and RCC-ACI were studied. The aim of the laboratory study was to rank and select among the classical particle size distribution models like Talbot & Richart, and analytical models as compressible packing model – CPM, the best grading curve which was capable of producing mixtures with the best aggregate interlocking and improved mechanical resistances. The effect of cement content (4% and 5%) as well as the potential of using silica fume in suspension (percentages of 5, 7 and 10% of cement mass) to improve the interfacial transition zone were evaluated. It was found that CPM is a powerful tool for aggregates ranking aggregates and designing well-graded mixtures like CTCS; the CBGM 2 EN 14227-1 mean curve achieved the best packing density. The effect of increasing the cement content from 4 to 5% in terms of mechanical strength has the same result as the addition of 7% of silica fume in mixtures with 4% cement. Eventually, mixtures with 5% cement and 10% silica fume showed modulus of elasticity similar to traditional CTCS; nonetheless, the HP-CTCS (high performance CTCS) split tensile strength was significantly higher (about 28%), leading to a lower Et,sp/fct,sp relationship, which is a highly positive outcome to improve mechanical durability of this innovative dry compacted concrete.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952024000500208&tlng=enhigh performance cement-treated crushed stonemechanical strengthaggregate packingsupplementary cementitious materialsilica fume in suspension |
| spellingShingle | Andréia Posser Cargnin José Tadeu Balbo Liédi Legi Barianni Bernucci Innovative high-performance cement treated crushed stones as rolled concrete Revista IBRACON de Estruturas e Materiais high performance cement-treated crushed stone mechanical strength aggregate packing supplementary cementitious material silica fume in suspension |
| title | Innovative high-performance cement treated crushed stones as rolled concrete |
| title_full | Innovative high-performance cement treated crushed stones as rolled concrete |
| title_fullStr | Innovative high-performance cement treated crushed stones as rolled concrete |
| title_full_unstemmed | Innovative high-performance cement treated crushed stones as rolled concrete |
| title_short | Innovative high-performance cement treated crushed stones as rolled concrete |
| title_sort | innovative high performance cement treated crushed stones as rolled concrete |
| topic | high performance cement-treated crushed stone mechanical strength aggregate packing supplementary cementitious material silica fume in suspension |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1983-41952024000500208&tlng=en |
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