Optimization by mixture design approach

Abstract

Purpose The purpose of this study is to fit an appropriate mathematical model to express response variables as functions of the proportions of the mixture components. One purpose of statistical modeling in a mixture experiment is to model the blending surface such that predictions of the response for any mixture component, singly or in combination, can be made empirically. Testing of the model adequacy will also be an important part of the statistical procedure. Design/methodology/approach A series of mortar using air lime, marble and ceramic sanitary waste aggregates were prepared for statistically designed combinations. The combinations were designed based on the mixture-design concept of design of experiments; this mortar is often used as a filler material in restoration projects. The aim of this work is to find an optimal composition of a paste for the manufacture of air lime mortar with ceramic and marble waste. This investigation aims to recommend mix design for air lime-based mortar, by optimizing the input combination for different properties, and to predict properties such as mechanical strength, thermogravimetric and x-ray diffraction analysis with a high degree of accuracy, based on a statistical analysis of experimental data. Findings This paper discusses those mortar properties that architects, contractors and owners consider important. For each of these properties, the influence of ceramic and marble waste in the air lime mortar is explored. The flexibility of lime-based mortars with waste materials to meet a wide range of needs in both new construction and restoration of masonry projects is demonstrated. Originality/value The objective of the present investigation is to recommend mixture design for air lime mortar with waste, by optimizing the input combination for different properties, and to predict properties such as compressive strength, flexural strength with a high degree of accuracy, based on the statistical analysis of experimental data. The authors conducted a mixture design study that takes into account dependent parameters such as the constituents of our air lime-based mortar where we have determined an experiment matrix to which we have connected the two responses, namely, compressive and flexural strength. By introducing the desirability criteria of these two responses, using JMP software, we were able to obtain a mixture optimal for air lime mortar with ceramic and marble waste.

Prediction of recycled coarse aggregate concrete mechanical properties using multiple linear regression and artificial neural network

“…The mechanical properties of concrete indicate significant aspects in the analysis and design of concrete structures as it is an important criterion to assist the structural quality of concrete (Ahmed et al , 2021; Eziefula et al , 2020; Abadou et al , 2020; Tantri et al , 2021). Several researchers carried out tests on the concrete cube, beam and cylinder made from RA concrete to study its effect on mechanical properties of concrete, such as compressive strength (CS), flexural strength (FS) and split tensile strength (STS) (Ismail and Ramli, 2013; Ismail and Ramli, 2014; Kou et al , 2011).…”

Mechanical and microstructural behavior of concrete containing marble and nano silica

“…Marble waste enduringly inhabits a large portion of landfills for disposal, being a non-biodegradable waste material (Abadou et al , 2020). It imparts serious damage to the fertility of soil, hydrology and ecology of the surrounding area, causing skin, visual and respiratory disorders, and its disposal is cost-intensive, time-consuming and is an inconvenient practice which leads to a lot of problems.…”