Rheological and structural properties evaluation in cementitious composites additive with nanomaterials and natural polymers to obtain eco-efficient cementitious composites

• Grant number: 23/01612-1
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2023
• End date: June 30, 2025
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Physical-Chemistry
• Agreement: CNPq
• Principal Investigator: Sandra Helena Pulcinelli
• Grantee: Sandra Helena Pulcinelli
• Host Institution: Instituto de Química (IQ). Universidade Estadual Paulista (UNESP). Campus de Araraquara. Araraquara , SP, Brazil
• Associated research grant: 14/50948-3 - INCT 2014: advanced eco-efficient technologies in cementitious products, AP.TEM
• Associated scholarship(s): 23/09852-1 - Rheological and structural properties evaluation in cementitious composites additive with nanomaterials and natural polymers to obtain eco-efficient cementitious composites, BP.JD

Abstract

Obtaining Eco-efficient cementitious materials with improved properties has been intensely studied through low-dimensional additives aimed at multifunctional cementitious materials. In this context, these additives aim to enhance the mechanical-structural properties of the cementitious material, promoting greater sustainability through the reduction of harmful effects on the environment (reduced water use and increased durability of structures) and low cost. This proposal proposes the development of additives for cement paste (Portland), with activities divided into three parts. The first consists of evaluating the effects of surface area and concentration of additives in composites added with Layered Double Hydroxides (LDH) on rheological properties and performing mechanical tests to demonstrate the efficiency of additives in improving the mechanical strength of the cementitious material. In the second stage, TiO2 nanoparticles and nanofibers will be incorporated into the system (commercial cement and cement added with LDH) to confer multifunctional properties through changes in the rheological properties of the paste, increased mechanical resistance and the ability to inhibit the adhesion of dirt and to promote the degradation of species harmful to health. In the third stage, the use of pectins with different molecular weights will be incorporated to accelerate the hydration kinetics of the paste and the homogenization of the additives in the composites previously produced. Such studies and the optimization of additive synthesis properties will allow directing and adapting methods for batch scheduling. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DOS SANTOS, CAIO C.; ALMEIDA, ADRIANA A.; PULCINELLI, SANDRA H.; SANTILLI, CELSO V.. Relevance of Specific Surface of Mixed Oxide Derived from Layered Double Hydroxides on the Rheological Properties and Porosity of Cement Pastes. ACS APPLIED MATERIALS & INTERFACES, v. N/A, p. 15-pg., 2024-06-05. (23/01612-1, 23/09852-1, 14/50948-3)