Influence of Microfibrillated Cellulose Additive on Strength, Elastic Modulus, Heat Release, and Shrinkage of Mortar and Concrete

Abstract

This work aimed to study the effect of a microfibrillated cellulose additive on strength, elastic modulus, heat release, and shrinkage of mortar and concrete. The dosage of the additive varies from 0.4 to 4.5% by weight of the cement. The change in strength with an increase in the dosage of the additive occurred in a wave-like manner. The uneven character of the change in the results also took place in the determination of heat release and shrinkage. In general, heat release and shrinkage decreased at increasing additive dosage. The additive showed the greatest decrease in the heat release of concrete at a content of 2%. The heat release of concrete practically differed little from the exotherm of the standard at an additive content of 1 and 1.5%. The addition of microfibrillated cellulose additive in small (0.5%) and large (1.5%) amounts reduced shrinkage compared to the reference, and at an intermediate content (1%), the shrinkage was higher than in the reference specimens. In this case, the water evaporation rate from concrete increased with an increase in the additive. With an increase in the additive dosage, the modulus of elasticity decreases. Thus, the microfibrillated cellulose additive provides concrete with lower values of the modulus of elasticity, heat release, and shrinkage, and the additive is recommended for use in concretes with increased crack resistance during the hardening period. The recommended additive content is 0.5% by weight of cement. At the specified dosage, it is possible to provide the class of concrete in terms of compressive strength C35/45.

Synergic Effect of Recycled Carbon Fibers and Microfibrillated Cellulose Gel for Enhancing the Mechanical Properties of Cement-Based Materials

“…In case of mortars containing MFC gel, the increased flowability can be attributed to the high-water content of the MFC gel, which contained 98 wt.% water. The addition of MFC gel to the concrete mixture elevated the overall water content, consequently enhancing the workability of the concrete as the dosage of MFC gel increased [32]. Another possible reason for this phenomenon may be related to the significant viscosity-modifying effect introduced by the MFC.…”

Evaluation of structure and compressive properties of eco-friendly cushioning materials based on starch and cellulose types

“…To manufacture starch-cellulose ECMs under optimal conditions, the manufacturing characteristics using CS and GS were compared. Nanofibrillated cellulose exerts a high strength-improvement effect when utilized as an additive because of its high aspect ratio and fine fibrils (Gonzales-Ugarte et al 2020; Barabanshchikov et al 2021). Because of the high energy consumption and manufacturing cost of mechanical processing, this study used pulp fibers and microfibrillated cellulose (MFC) containing fine fibers (Kargupta et al 2021;Pradhan et al 2022).…”

Recyclable Materials for Ecofriendly Technology

“…The authors of [ 49 , 50 ] demonstrated the application of a machine learning-based algorithm approach named “Multi Expression Programming” (MEP) to forecast the compressive strength of carbon fiber-reinforced polymer (CFRP)-confined concrete. Barabanshchikov et al [ 51 ] studied the effect of a microfibrillated cellulose additive on strength, elastic modulus, heat release, and shrinkage of mortar and concrete. Petropavlovskii et al [ 52 ] used gypsum-containing waste from a faience factory in the form of waste molds for casting dishes, souvenirs, and plumbing fixtures.…”