Influence of phase change material and nano silica aerogel aggregates …
— The fine aggregate was garnet sand with a maximum dimension of 2.5 mm. The water absorption and dry density in the saturated surface dry condition were 1.35 % and 2640 kg/m 3, respectively.To achieve proper workability, a polycarboxylate ether superplasticizer (SP) was used, in which the solid concentration and specifics density of …
Smart materials and technologies for sustainable concrete …
— Concrete is a sustainable and versatile construction material which can produce structures that last for thousands of years. Due to the many areas of application, concrete is the second most consumed material on Earth, only after water, with a global production of around 4.1 billion tons of cement in 2021 (Statista, 2023), and an annual …
Use of recycled plastic as fine aggregate in cementitious composites: A
— Table 2 presents several properties of commonly used polymers, such as tensile strength (f t), thermal conductivity (λ) and Young's modulus (E), in addition to the basic components of concrete, such as quartzite sand, limestone aggregate and cement paste. Table 2 shows that all types of plastic have a much lower elastic modulus and …
Performance of engineered cementitious composites incorporating crumb
— The high performance of engineered cementitious composites (ECC) achieved through micromechanics design and reinforced with a low fiber volume (i.e. 2%) has made it an excellent construction material for various applications [1], [2].In order to achieve this outstanding performance of ECC, silica sand (SS) which is an ultrafine …
A Study of Fine Aggregate Properties and Their Effect on …
— It is well known that aggregates constitute 75–80 % of concrete by volume (Tugrul and Yılmaz 2012).In mortars, the most common aggregate to binder ratio encountered in the literature is 3:1 by weight (Stefanidou and Papayianni 2005).Inevitably, the characteristics and quality of aggregates have an effect on the long-term …
Influence of fineness modulus of fine aggregates on …
— Even though aggregates make up a larger part of the components of alkali-activated composites (AACs), research on the influence of this parameter is limited. This study aims to investigate the influence of the fineness modulus (FM) of fine aggregates on the mechanical and thermal resistance properties of AACs. The FM of fine aggregates in …
On the origin of eigenstresses in lightweight aggregate concrete
— Three types of composites were studied, all with a cement paste volume percentage of 66.7% and an aggregate volume percentage of 33.3%, but with different contents of glass spheres (NWAs) versus Liapor grains (LWAs) (see Table 2).The glass spheres had an average size of 5.91 ± 0.15 mm and a Young's modulus of 77 GPa and …
Concrete Composites | Formula, Properties & Application
Aggregate: Aggregates include sand, gravel, or crushed stones. They give volume to the composite, reducing the amount of cement needed and improving the composite's …
Enhancing compressive strength in cementitious composites …
— The incorporation of recycled waste plastics as a substitute for aggregates in cement-based materials (i.e. concrete and mortar) is emerging as a sustainable solution for addressing both the shortage of natural aggregates in construction sites and the issue of plastic waste pollution [[3], [4], [5]]. Beyond its environmental ramifications, the ...
An efficient and high-volume fraction 3D mesoscale
— To address the cumbersome nature of mesoscale models for concrete as well as other similar materials, this paper presents an efficient and high-volume fraction mesoscale modeling framework with a novel aggregate surface tracking algorithm as well as an aggregate-cement interface interaction model to replace the interface transition …
Mechanical behaviour of wollastonite-based cement composites
— The drop in the compressive strengths of the CPC composites incorporating rubber aggregates is caused by the lower stiffness of the rubber aggregates when compared to the cement matrix of CPC material. Thus, cement composites with high compressive ductility are created through the rubber aggregates-cement matrix …
Composite materials based on heteroaggregated particles: …
— Homoaggregation of dispersed particles, i.e., aggregation of particles of the same shape, charge, size, and composition, is a well-studied field and various …
First passage calculation of the conductivity of particle aggregate …
— There is considerable interest in transport via conduction through particle laden suspensions (e.g. nanofluids) and composite materials. Frequently, such multiphase systems display enhanced conductivities beyond what is expected from the effective medium approximation. While the origin of this enhancement is often a source of …
Hydraulic transport properties of unsaturated cementitious composites
— Plus, the finer aggregates in composites lead to the higher hydraulic transport properties, while the exponent of power-law distribution has a small effect on the effective hydraulic properties of CC. (2) With respect to the shape of aggregates, the ITZ properties including the ITZ thickness and volume fraction more sensitive to the hydraulic ...
Growing Nanocrystalline Graphene on Aggregates for …
— Highly conductive concrete/mortar has been long pursued to realize structural health monitoring in the development of smart-cement-based facilities. However, it remains challenging to significantly increase the electrical conductivity of concrete/mortar without lowering the compressive strength and flowability. Here, nanocrystalline-graphene …
Aggregate (composite)
Aggregate is the component of a composite material that resists compressive stress and provides bulk to the composite material. For efficient filling, aggregate should be much smaller than the finished item, but have a wide variety of sizes. Aggregates are generally added to increase the strength of composite materials.
Fire‐retardant and high‐strength polymeric materials …
Aggregate is an open access aggregate science journal for research involving the assembly of structures - from cell & protein aggregation to aggregate materials. ... The results show that polypropylene composites (PPMn33) filled with 4.5 wt% PAMA-Mn, 9.0 wt% ammonium polyphosphate (APP), and 4.5 wt% pentaerythritol can reach a UL-94 V-0 rating ...
Influence of Aggregate Type and Size on Ductility and …
ECC is a micromechanically-based designed high-performance fiber-reinforced cementitious composite with high ductility and improved durability due to tight crack …
What Is Composite Material?- Definition And Types
The composites on a Boeing 787 Dreamliner in the mid-2000s substantiated their use for high-strength applications. Different Types of composite materials. Some common composite materials include: Ceramic matrix composite: Ceramic spread out in a ceramic matrix. These are better than normal ceramics as they are thermal shock and fracture …
Preparation and performance evaluation of high-strength
— The preparation of high-strength phosphogypsum aggregates (HPA) was explored in this study by the compaction–fragmentation–grinding–hydration process from mixture of PG GGBS OPC dry powders. The dry powder blocks were first produced by compaction using the programed pressure and then was crushed into small pieces with …
A critical review of cement composites containing recycled aggregates …
— If manufactured CDW has converted to aggregates [5], Europe might reach zero waste concrete today [3]. In this review, cement composites represent RA-based construction materials, including different types of mortar and concrete. However, producing cement composites using RA could save natural resources and address the CDW …
Introduction to the Principles of Cement and Concrete Composites …
— Composite materials (combinations of aggregates) offer an in-built mixture of toughness and stiffness with corrosion resistance and lightweight properties. Such materials are obtained from various compositions with different physical and chemical characteristics. Combinations of such concretes give special capability that gives composite ...
Composite vs. Aggregate: Know the Difference
— The selection between composite materials and aggregates depends on the specific requirements of the project, including strength, durability, weight, and environmental conditions. While composites offer …
Effect of Fine Aggregate and PVA Fiber Content on the …
— The mechanical and physical properties of novel metakaolin (MK) based Engineered Geopolymer Composites (EGCs) consisting of locally available river sand (RS) or manufactured microsilica sand (MS) reinforced with polyvinyl alcohol (PVA) fiber were studied. Plain geopolymer (GP) binder, GP mortars, and fiber-reinforced composites …
A Voronoi-based gaussian smoothing algorithm for
— Fig. 3 exhibits the determination process of the layer number of all the elements in the voxel-based sub-region V i.Based on the element matrix M tag i, where the aggregate element in V i is 1 and the others are 0, the expanded M' tag i is traversed and analyzed, and the layer numbers of the aggregate elements from outer to inner are …
A fundamental review on composite materials and some of …
— Composites or composite materials are engineered materials that consist of two or more constituent materials with wide discrepancies in their physical, chemical, …
COMPOSITES AND CONCRETE | CompositesWorld
— A true composite, concrete typically consists of gravel and sand — aggregate — bound together in a matrix of fine Portland cement, with metal rebar usually incorporated for strength. It performs admirably …
Recycled concrete aggregates
— Cement and Concrete Composites. Volume 27, Issue 2, February 2005, Pages 315-318. Recycled concrete aggregates. Author links open overlay panel Nik.D. Oikonomou. Show more. Add to Mendeley ... Aggregates from recycled aggregate (RCA) are already used in all countries in various applications of civil engineering works, as …
Nano-engineered the interfacial transition zone between …
The enhancement of the ITZ in cement composites through pre-wetting aggregates has garnered significant attention in practical applications due to its simplicity, cost-effectiveness, and effectiveness [11,52,53]. It has been accepted that admixing the well-dispersed GO can promote the hydration of cement [[54], [55], [56]]. Therefore, we ...
A meta-analysis on the use of plastic waste as fibers and aggregates …
— The aim of this work was to go further in meta-analyzing the available published data on the use of plastic waste as fibers and aggregates in cement composites, focused on the influence that the mixture proportions have on the thermo-mechanical and physical properties of these composite materials.