Laboratory and Field Evaluation of RAP for Cement Concrete Pavements
01 Jun 2020-Vol. 146, Iss: 2, pp 04020011
TL;DR: In this article, the feasibility of coarse reclaimed asphalt pavement (RAP) for dry lean concrete (DLC) and pavement quality concrete (PQC) mixes is assessed through laboratory and field experiments.
Abstract: In the present study, the feasibility of coarse reclaimed asphalt pavement (RAP) for dry lean concrete (DLC) and pavement quality concrete (PQC) mixes is assessed through laboratory and fie...
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TL;DR: A review of the utilization of reclaimed asphalt pavement aggregates in roller compacted concrete pavement (RCCP) mixes is presented in this paper, where several issues and factors affecting the fresh and hardened properties of RCCP mixes due to the incorporation of RAP are discussed.
28 citations
TL;DR: In this article, the authors describe an investigation into the assessment of performance and suitability of pervious paver blocks (PPB) using reclaimed asphalt pavement (RAP) aggregates.
17 citations
TL;DR: In this article, the use of RAP aggregates with cementitious materials for pavement foundation layers is discussed, and a review of the properties of fresh and hardened RAP in cementitious matrices, as well as changes in the microstructure.
15 citations
TL;DR: In this article, the use of the mixture of three residues, evaluating the feasibility of using these as a pavement layer, has been studied, and a generalized approach to replace the laborious durability test is proposed, and limitations are observed.
Abstract: The use of domestic, industrial and construction waste has been gaining considerable space in recent decades in view of the social and environmental concern in preserving and reusing natural resources. Thus, this article has the premise of studying the use of the mixture of three residues, evaluating the feasibility of using these as a pavement layer. The first residue is the reclaimed asphalt pavement (RAP) coming from the milling of the asphalt coating of a pavement. The second material used is carbide lime (CL), a residue from the production of acetylene gas that will act as a cementing agent. To react with the carbide lime, a third material was also used: the flat ground glass, since it has a high content of SiO2 in its composition. Thus, it is possible that pozzolanic reactions occur with calcium ions in lime, forming cementing compounds and acquiring properties of strength, durability and rigidity. It was evaluated the variation of the carbide lime (3 and 7%), the dry unit weight (19 and 20 kN/m3) and the ground glass (GG) content passing through the #200 sieve (10, 15 and 25%) in front of the unconfined compression, split tensile, durability and rigidity tests. The results show that the effect of each of the selected variables is considered satisfactory to obtain significant results for each of the tests. The porosity/binder index [η/Biv0.28] proved to be adequate for predicting the mechanical behavior of the mixtures, and it was even possible to make correlations between test results. Furthermore, a generalized approach to replace the laborious durability test is proposed, and limitations are observed.
8 citations
TL;DR: In this paper, the performance of concrete paver blocks using coarse and fine fractions of non-beneficiated reclaimed asphalt pavement (RAP) materials, derived as a waste residue from demolished asphalt pavement, was comprehensively and comparatively investigated.
7 citations
References
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TL;DR: In this article, the strength and fracture properties of RCC containing virgin aggregates and fractionated reclaimed asphalt pavement (FRAP) relative to conventional portland cement concrete (PCC) pavement with similar slab thickness were investigated.
Abstract: Roller-compacted concrete (RCC) pavement has renewed interest among designers as a sustainable pavement option with the potential to lower total cement content, incorporate recycled aggregates, reduce road closure time, and decrease total project costs. One main design challenge is whether RCC can achieve the same performance life as conventional portland cement concrete (PCC) pavement with similar slab thickness. This research investigated the strength and fracture properties of RCC containing virgin aggregates and fractionated reclaimed asphalt pavement (FRAP) relative to conventional PCC to address this design challenge. The compressive and split tensile strengths of the RCC mixes showed similar strengths to the same constituents in PCC. RCC containing FRAP had lower strengths than did RCC with virgin aggregates. The critical stress intensity factor and the initial and total fracture energies were not statistically different between the RCC mixes containing virgin and FRAP aggregates. Overall, the RCC ...
49 citations
TL;DR: In this paper, full-depth and two-lift concrete slabs were cast with fractionated reclaimed asphalt pavement and recycled concrete aggregate as partial and full replacements of the coarse aggregate in a ternary blend concrete containing cement, slag, and fly ash.
Abstract: Full-depth and two-lift concrete slabs were cast with fractionated reclaimed asphalt pavement and recycled concrete aggregate as partial and full replacements of the coarse aggregate in a ternary blend concrete containing cement, slag, and fly ash. These large-scale slabs were monotonically loaded at the edge to quantify the effect of recycled aggregates on the slab's flexural capacity. Although the introduction of these recycled aggregates into the concrete reduced the compressive, split tensile, and flexural strengths as well as the elastic modulus of the concrete relative to virgin aggregate concrete, fracture testing demonstrated that recycled concrete aggregate can have fracture properties statistically similar to those of virgin aggregate concrete. Testing of the flexural capacity of the slabs revealed that concrete with recycled aggregates had peak loads at failure similar to or greater than those of virgin aggregate concrete despite a significant difference in beam flexural strength. The calculate...
49 citations
TL;DR: In this article, the authors developed an innovative fracture test using the semicircular bending (SCB) geometry to characterize the two-parameter fracture properties (TPFP) of concrete (critical stress intensity factor, K Ic s, and critical crack tip opening displacement, CTOD c ).
Abstract: Although few available test results showed that portland cement concrete containing reclaimed asphalt pavement (RAP-PCC) can have equivalent (or even improved) fracture properties and ductility compared to plain PCC, the limitations of the existing experimental methods to test the two-parameter fracture properties (TPFP) of concrete (critical stress intensity factor, K Ic s , and critical crack tip opening displacement, CTOD c ) have hindered an effective characterization of RAP-PCC's fracture properties and ductility. To provide an easy but effective approach, this paper developed an innovative fracture test using the semicircular bending (SCB) geometry to characterize the TPFP of the studied RAP-PCC mixtures. Based on the results, it is confirmed that addition of RAP improves PCC's CTOD c and G f , despite of a reduction in mechanical strengths. The material length, Q , of the RAP-PCC mixture is statistically higher than that of the plain PCC, suggesting that RAP-PCC is a more ductile material. Besides, the theoretical tensile strength, tensile MOE, and bilinear softening curve of the RAP-PCC can be easily obtained using the developed SCB fracture test.
47 citations
TL;DR: In this article, Dense Bituminous Macadam (DBM) mixes were prepared with different proportions (50% and 100%) of coarse RAP, fine RAP and total RAP (T) obtained from two different sources separately.
44 citations
TL;DR: In this paper, the potential and suitability of different fractions of reclaimed asphalt pavement for roller compacted concrete pavement (RCCP) mixes is evaluated. Natural coarse and fine agg...
Abstract: The present study evaluates the potential and suitability of different fractions of reclaimed asphalt pavement (RAP) for roller compacted concrete pavement (RCCP) mixes. Natural coarse and fine agg...
43 citations