Microstructure of ultra-high-performance concrete (UHPC) – A review study
1. Introduction. Ultra-high performance concrete (UHPC) is a new generation of high-performance concrete with extremely high strength, ductility, and durability [1, 2].This type of concrete is generally considered to be characterized by a compressive strength above 150 MPa, fracture energy in the range of 1200–40000 J/m 2, a Young …
Durability performance of self‐compacting concrete made …
In this study, durability properties of self-compacting concrete (SCC) made with various percentages (0%–30%) of WFS as a partial replacement of river sand up to …
Water absorption behaviour of concrete: Novel
1. Introduction. Water absorption is one of the most important transport properties of concrete. Most aggressive ions penetrate into concrete through water absorption, leading to durability-related damage and performance degradation [[1], [2], [3]].Although diffusion also plays a role in ionic transport, it has been demonstrated that …
(PDF) STUDY ON CONCRETE WITH MANUFACTURED SAND …
Use of fly ash as a partial replacement material for cement in concrete was also investigated in this study. In total 72 cubes were casted in three sets for experimental purposes. of river ...
(PDF) A STUDY ON FOUNDRY SAND: OPPORTUNITIES FOR …
concrete and recycling old, demolished concrete as aggregate for new concrete. This study presents the information about the opportunities. for sustainable and economical concrete. Applications of ...
Study on performance of lightweight concrete bricks with …
The study resulted in the 28-day strength of the CLC brick with a mass ratio of cement to sand 1:2 of 0.52 MPa, and the strength of the CLC brick with a mass ratio of cement to sand 2:3 was 0.68 MPa.
What are the Correct Concrete Mixing Ratios
When making your own concrete it's important to use the correct concrete mixing ratios to produce a strong, durable concrete mixture. Some basic mixing ratios for concrete are 1:2:3, 1:3:3, 1:2:4. These mixing ratios are based on the proportions of cement : sand : stone in that order. The ratio you use will depend on what psi strength …
Experimental Study on Partial Replacement of Natural …
Natural (River) Sand. Natural sand has an excellent modulus of 2.78 and, after washing in clean water, complies with Zone II according to IS: 383-1970. The specific gravity of this natural sand was found to be 2.55. The water absorption and moisture values obtained for the sand used were 6% and 1.0%, respectively. 3.
Development of an environmental-friendly durable self …
Loss in compressive strength, weight change, sorptivity, and micro-structural changes (XRD, SEM, and EDS) all were evaluated for up to 360 days. It was found that …
Development of cementitious capillary crystalline …
Development of cementitious capillary crystalline waterproofing agents and durability study of concrete in the presence of chloride with sulfate in aqueous environment. Author links open overlay panel Zilong Wu a b, Jun Zhang c, Wei Xu d, ... The mixture of medium sand and fine sand with the ratio of 1:1 was used, where the …
Study of interface shear strength between sand and concrete
The friction angle of sand-concrete interface decreases with increasing interface area ratio from 0.28 to 0.75. The peak shear stress was formed in sand-concrete samples with Ar = 0.28, and it is almost similar to that of natural sand samples. The mobilized friction angle decreases with the increasing Ar.
Self-Compacting Concrete: Theoretical and experimental study
Furthermore, Fig. 3 reveals that all sand/gravel mixes attain a minimum void fraction with sand/gravel (mass) ratios of 40/60 to 60/40 (both in loose and compacted condition). The coarser the sand, the higher the most favourable sand content (as a smaller volume of the concrete will then comprise paste). Fine sand (0–1 mm) attains a …
Concrete Calculator
Concrete Calculator. Our online tools will provide quick answers to your calculation and conversion needs. On this page, you can calculate material consumption viz., cement, sand, stone gravel for the following concrete mix ratios - 1:1.5:3, 1:2:4, 1:3:6, 1:4:8, 1:5:10. Once, the quantities are determined, it is easy to estimate the cost of a ...
Sustainability | Free Full-Text | Experimental Study on the …
In this investigation, coral sand is presented as a sustainable substitute for conventional river and machine-manufactured sand. This study comprehensively …
Study on performance enhancement of self-compacting concrete
This study investigates the usability of waste foundry sand in self-compacting concrete (SCC). Fine aggregate was replaced with WFS with ratios ranging from 0 to 40%. ... As stated above, although valuable research is already available in the case of ordinary concrete, very limited studies on the SCC containing WFS and its …
Concrete Sand | ASTM C33 Sand | CSA A23.1 FA1
ASTM C33 sand is a traditional bedding layer in paver installation. It is used as no more than a 1″ on top of a specified amount of a dense graded material for the base. It is not used on top of clean stone, as it would migrate into the voids of the clean stone base material. However, we have opted for an alternative bedding layer in all of ...
Experimental Study on Performance Influencing Factors and
The utilization of desert sand for making ceramsite lightweight aggregate concrete is proposed to make full use of local natural resources in the development of a new type of lightweight and load-bearing wall material with good energy conservation, waste utilization, and thermal insulation performances. An orthogonal test was conducted to …
Comparative Study on Conventional Concrete with M …
Comparative Study on Conventional Concrete with M-Sand Concrete Using Alccofine higher strength is required. Furthermore, poor compressive strength can increase the likelihood of cracking, shrinkage, and other forms of damage, leading to increased maintenance costs and reduced longevity of the concrete structure.
Feasibility Study on Concrete Made with Substitution of …
Abstract: Concrete mechanical properties could be improved through adding different materials at the mixing stage. Quarry dust (QD) is the waste produced …
Enhancing Sustainable Concrete: A Study on Mechanical
The current study examines how treated recycled aggregate affects the mechanical and durability characteristics of concrete made with the sand envelope …
Toughness and Microstructure of Sand Concrete
Abstract: The fracture toughness of sand concrete is affected by aggregate characteristics. In order to study the possibility of exploiting tailings sand, available in …
Elaboration of recycled concrete sand aggregates-based …
The materials selected for the preparation of the control and the RCSAs-based mortars were CEM I 42.5 R cement with no supplementary cementitious materials, perlite as a mineral addition, natural silica sand and recycled concrete sand aggregates collected from crushed concretes featuring a C25/30 compressive strength class. 2.1. …
Use of Industrial Silica Sand as a Fine Aggregate in …
This paper aims to explore the suitability and optimum utilization of silica sand in concrete mix. Since this sand is rich in silica, studies like XRF, SEM and EDAX were performed to check whether reactive silica is present to confirm its inertness as a fine aggregate. Fresh and hardened concrete properties was examined for VC—Veli Coarse
A study on the printability of manufactured sand concrete
Abstract. 3D printed concrete (3DPC) is a rapid construction technology that uses concrete as an ink material to build three-dimensional structures layer by layer, with the advantages in free formwork, complex buildings and cost savings. In this paper, the printability and mechanical properties of 3D printed manufactured sand …
Flexural behavior of GFRP bars reinforced seawater sea sand concrete
The compressive strength data of concrete test cubes in this study and another relevant study [50] are normalized, ... When the first crack appeared in GFRP reinforced seawater sea sand concrete beam, the crack width was large, and it propagated highly along the section. After the experiment was finished, the cracks were …
Effect of Glass Fibers on the Mechanical Behavior as Well as …
Ahmad Jan, Zhang Pu, Kashif Ali Khan, Izhar Ahmad & Irshad Khan. 163 Accesses. 3 Citations. Explore all metrics. Abstract. In this study, the incorporation of …
Study of interface shear strength between sand and …
The mobilized friction angle of sand-concrete interface with groove of 8 mm is about 75–89% higher than that of sand-concrete interface with surface. 3. The friction angle of sand-concrete ...
Development of sustainable modified sand concrete: An …
Abstract. The present study aims to develop 4 types of sustainable modified sand using various proportions of desert sand, natural crushed sand, and recycled …
Study on properties of concrete with foundry sand …
For the casting of concrete, OPC Cement of Grade 43 and sand is taken in a 1:1 ratio. The specific gravity of the cement used in the test is 3.053. The initial and final setting time was 83 min and 190 min respectively. Consistency of cement is …
Self-Compacting Concrete: Theoretical and experimental study
Abstract. This paper addresses experiments and theories on Self-Compacting Concrete. First, the features of "Japanese and Chinese Methods" are discussed, in which the packing of sand and gravel plays a major role. Here, the grading and packing of all solids in the concrete mix serves as a basis for the development of …