Optimization of selection process of constituent materials for high performance concrete and mortars

Lushnikova, Nataliya

doi:10.35784/bud-arch.1667

Cited by 2 publications

(2 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Non-optimized (under-designed or over-designed) HPC mixtures are almost always uneconomical and ineffi cient [11,12]. Effi cient HPC mixtures with cement content balanced to achieve the desired performance while minimizing the risk of problems arising from high cement content (such as the obvious increased cost, the negative environmental effects [13], shrinkage and cracking problems) and reduced resource requirements in infrastructural applications can only be achieved with optimization of HPC mixtures on a quantitative basis [14].…”

Section: Cement Concrete Mixture Performance Characterizationmentioning

confidence: 99%

Cement Concrete Mixture Performance Characterization

Chisala

2019

Bud-Arch

View full text Add to dashboard Cite

The cementitious composite nature of concrete makes very diffi cult directly ascertaining each mixture-factors’ contribution to a given concrete mixture performance characteristics but also doubly diffi cult to accurately balance mutually exclusive requirements for performance (workability, strength, durability) and sustainability (the economic and effi cient use of materials) for mixture proportioning based on recipes of previously produced concretes. This study sought to quantify individual mixture-factors’ contribution to a given concrete mixture’s performance characteristics. Proposed multi-parametric exponential mixture-response models were fi tted to available test-performance data sets of HPC mixtures proportioned based on the best combined grade aggregate (minimum void) to generate mixture-strength and mixture-porosity development (age-mixture response relationships) profi les of HPC mixtures and deemed robust enough to yield reliable determination of mixture-response rate-parameters So, Sp, Si and Po, Pp, Pi as functions of mixture-factors that permitted reliable quantifi cation of contributions to HPC mixture performance of individual mixture-factors and optimization of mixture properties under study over the study domain. Mixture-response sensitivity analysis models (or mixture response trace plots) to allow construction of mixture-factor envelopes and ultimately optimized mixture-response models to facilitate selection of optimal mixture-factors and optimal tailoring of HPC mixture requirements to HPC mixture performance were developed and used to obtain optimized adapted HPC mixtures from available high performance concrete (HPC) mixture design recipes investigated in the study over the study domain. Adapted HPC mixture design recipes yielded alternative mixture compositions with improved performance and effi ciency characteristics with statistical performance metrics MAPE, NMBE and RMSE values of 7.6%,–3.7% and 6.5 MPa, respectively.

show abstract

Section: Cement Concrete Mixture Performance Characterizationmentioning

confidence: 99%

Cement Concrete Mixture Performance Characterization

Chisala

2019

Bud-Arch

View full text Add to dashboard Cite

show abstract

“…In concrete manufacturing, one of the main lines of action is the technical-economic optimization of the different components involved in the dosage of the concrete mixture. Here, the most important costs are those of the cement and chemical additives, which have a significantly higher unit cost than the raw materials (water and aggregates) [5]. Thus, these costly components are normally dosed in lower proportions, giving preference to the functional requirements of the elements for manufacture [6].…”

Section: Introductionmentioning

confidence: 99%

Technical-Economic Opportunities of Mixture Optimization and Recycled Aptitude at a Pre-Casting Concrete Plant

Montero

Cervera-Gascó

2023

Applied Sciences

View full text Add to dashboard Cite

Cost optimization is a key factor in the competitiveness of construction companies. Hence, in the case of a concrete manufacturing plant, the technical-economic optimization of the process involved in producing concrete is a determining factor in its activity being more competitive than that of other companies. Thus, the main objective of this experimentation is the optimization of the different concrete dosages used in a pre-casting plant. The cement volume, the water/cement (W/C) ratio, the influence of an accelerator additive and replacing coarse aggregate with recycled aggregate were analysed. As an application of the economic results, three different hypotheses were analysed for different mix combinations in a real concrete structure model. The results show that it is essential to monitor the actual initial moisture state of aggregates and the perfect definition of the effective water/cement ratio of the dosage (Wef/C) in manufacturing in order to obtain more homogeneous production. It is proposed to simplify the number of different mix proportions and reduce cement by 10–20% without decreasing resistance and functional capabilities. Regarding additive optimization, the results show that using low rates of accelerator additive significantly improves compressive strength. Replacing natural aggregates with recycled aggregates obtained from the concrete waste of non-conforming elements is suited to manufacturing recycled concrete using replacement rates of 50% and 100%. The cost analysis for a real industrial building applying the different dosing options studied shows that a cost reduction of up to 17.8% can be achieved.

show abstract

Optimization of selection process of constituent materials for high performance concrete and mortars

Cited by 2 publications

References 8 publications

Cement Concrete Mixture Performance Characterization

Cement Concrete Mixture Performance Characterization

Technical-Economic Opportunities of Mixture Optimization and Recycled Aptitude at a Pre-Casting Concrete Plant

Contact Info

Product

Resources

About