Abstract
The exponential advancement of cutting-edge technologies in the scope of civil construction, seeks to give cement-based materials the eco-efficient potential linked to mechanical performance that enables different applications. This work aims to evaluate the glass residue regarding the pozzolanic potential through ABNT NBR 5752:2014, as well as to verify whether through the characterization tests of x-ray fluorescence, x-ray diffraction and laser diffraction granulometry, if it is viable of application as supplementary cementitious material (filler), in ultra-high performance concrete. The glass residue submitted to the tests proposed in this study, was crushed in a jaw crusher, milled in a bench ball mill at 47 rpm, and was sieved in a 75 µm opening mesh (ABNT nº 200 mesh). For the test of pozzolanic activity, CP II F-40 class cement, normal sand, water from the public supply network, and superplasticizer additive were used for the mix with 25% of the residue replacing cement, while for the other characterization techniques, the glass residue was applied in its processed form (after sieving), dry or wet. The evaluated glass residue did not reach the minimum rate of 75% established by ABNT NBR 5752:2014, achieving only 45.72%, being classified as non-pozzolanic, which indicates its inert behavior in the presence of calcium hydroxide. The characterization tests confirmed, based on the specialized literature on ultra-high performance concrete, its viability as a filler when adopted as an alternative raw material for presenting chemical and mineralogical composition, in addition to granulometric distribution, very close to those used in studies that demonstrated satisfactory results when using the glass residue as an input.
Highlights
The design of studies that seek to incorporate the eco-efficient potential into conventional materials is becoming increasingly present due to the considerable increase in the consumption of non-renewable raw materials
The pozzolanic potential of a material is configured to detonate cementing properties when it reacts in the presence of calcium hydroxide (CH), which originates from the hydrated phases of Portland cement, producing low-density calcium silicate hydrated (C-S-H) (Cunha Oliveira, Chagas, Meira, Carneiro & Melo Neto, 2020; Cunha Oliveira, Meira & Lucena, 2021), similar to that produced by C3S and C2S
3.1 Pozzolanic Activity Index Seeking to interpret the result obtained from the pozzolanic potential of the glass residue in producing C-S-H in the presence of Portlandite, with a particle size of less than 75 μm, Table 3 presents the arithmetic mean for the 4 tested specimens of each composition made
Summary
The design of studies that seek to incorporate the eco-efficient potential into conventional materials is becoming increasingly present due to the considerable increase in the consumption of non-renewable raw materials. For effective use in the civil construction sector, are favorably configured by the industry being one of the most consumed inputs of non-renewable origin, such as natural aggregates for mortar and concrete, as well as with high load environmental, such as Portland cement. The pozzolanic potential of a material is configured to detonate cementing properties when it reacts in the presence of calcium hydroxide (CH), which originates from the hydrated phases of Portland cement, producing low-density calcium silicate hydrated (C-S-H) (Cunha Oliveira, Chagas, Meira, Carneiro & Melo Neto, 2020; Cunha Oliveira, Meira & Lucena, 2021), similar to that produced by C3S and C2S (tricalcium and dicalcium silicates), and which increases the durability of the cement matrix in the hardened state
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