The aim of this study is to evaluate the e ffects of inclusion nano-silica (also known as nano-SiO. on the properties of pervious concrete containing fly ash (FA) as a partial replacement to ...

Silica nanoparticles (SiNPs) are widely used in the materials science field as precursors to new technologies development. In recent years, the use of silica as a nanomaterial has attracted researchers' attention worldwide due to its exceptional properties such as low density, high surface area, and pore volume, good …

About 20%–30% of cement content can be reduced by nano silica. Thus, nano silica can be an alternative material to cement. However, the disadvantage of nano silica is its price and availability in certain countries. Some countries have to import nano silica to be used in concrete industry [4]. 6. Nano alumina

Several review studies have been performed on nano-silica-modified concrete, but this study adopted a new method based on scientometric analysis for the keywords' assessment in the current research area. A scientometric analysis can deal with vast bibliometric data using a software tool to evaluate the diverse features of the …

chanical characteristics in concrete [33]. With the usage of Nano-silica, concrete segregation and bleeding were lowered, setting time was increased, and fresh mix cohesiveness was enhanced [34–36].

Tables 7 and 8 show that increasing the nano-silica content reduced the water absorption of both concrete samples. After 10 min, the inclusion of 1%, 2%, and 3% nano-silica content to M 30 grade concrete resulted in a reduction in water absorption of 5.15%, 30.15%, and 35.66%, respectively, compared to the control mix.

Amrinsyah Nasution. Nano-scale silica or nanosilica is a material at level of individual atoms and molecules in the range of 0.1 to 100 nanometer (10 -6 mm). Adding nano-scale silica fume into concrete mixes improves durability of concrete structures. Understanding enactment that takes place in the cement particle at a nano-scale level can lead ...

Various nanomaterials, including nano-silica (NS), have undergone comprehensive scrutiny as potential partial substitutes for cement in concrete …

PowerPoint Presentation. Colloidal Nano-Silica as a Concrete Treatment: Laboratory and Case Studies. A. Brent Rollins, Director Civil Engineering Materials Research …

got less increase in 3 rd day strength compared to concrete containing 3% nano silica. But there is a comparable increase in at 28 th day strength for concrete containing 1.5%. nano silica as ...

Investigations on Nano-silica in concrete resultd in reduction in water absorption, coefficient of water absorption and permeability than Normal concrete. International …

The compressive strength of both ternary blended-based geopolymer concrete with nano silica and without nano silica had increased with the length of time, the concrete had been in place. Figure 2 ...

Steel fiber reinforced concrete (SFRC) offers improved toughness, crack resistance, and impact resistance. Nano-silica enhances the strength, durability, and workability of concrete. This study ...

NS was also found to improve, even at small replacements, the interfacial transition zone along with the shrinkage performance. Said et al. [12,13] found that using small dosages of NS in concrete enhanced the mechanical properties and the durability of concrete. In mixtures with 30% of cement replaced by fly ash and 3-6% NS, concrete achieved ...

In this study, a two-layer feed-forward neural network was constructed and applied to determine a mapping associating mix design and testing factors of cement–nano silica (NS)–rice husk ash ternary blended concrete samples with their performance in conductance to the water absorption properties. To generate data for the neural network …

The packed silica RD bed produces a daily freshwater of 8.625 kg/kg at an 800 s cycle time, while the coated new silica bed produces 5.214 kg/kg of silica at a cycle time of 600 s.

Effects of Nano-silica on Concrete Properties—Literature Review. Conference paper. First Online: 29 November 2019. pp 507–524. Cite this conference …

In field, the research has been extended to the usage of Nano material in concrete and thereby enhancing the performance of the structure. It has been identified that incorporating a trifling amount of Nano material in concrete can modify the properties of cement at Nano level which makes the concrete much sustainable. Among the various Nano …

Highlights. •. Nano-silica up to 3% can enhance mechanical and durability properties of concrete. •. Concrete compressive strength increases as the content of nano-silica increases. •. Nano-silica has a very high pozzolanic activity. •. Filling effect of nano-silica notably influences the refinement of pore structure.

Abstract. High-performance concrete (HPC) using nanosilica (NS) has higher mechanical properties and. durability than convent ional concrete. T he highly active silica ultrafine particles have ...

Though Nano-silica could be well spread in water, it inclines to lump in solution because the accessible ions of calcium in the solution of pores will absorb on Nano-silica's surface, instigating the agglomeration [51].Polycarboxylate-based admixtures are generally utilized to reduce water, but it is also decent dispersant for steadying Nano …

Present study assesses the durability performance of concrete mix with the addition of marble dust and Nano silica as partial replacement of cement. Concrete blends with 1 %, 2 %, and 3 % Nano silica and 5 %, 10 %, and 15 % marble dust powder were prepared at constant water to binder ratio of 0.4. The bulk density, water permeability, …

Nano silica (also named as nano-silicon dioxide) is a kind of inorganic chemical material, commonly known as white carbon black. Because of its ultra-fine nano scale and its size range of 1-100nm, it has many unique properties, such as optical properties against ultraviolet, which can improve other materials' anti-aging, strength and chemical …

These nano silica particles are stabilized in solution by an electrical double layer that prevents the nano silica particles in dispersion from agglomerating. 1.2 Concrete Mixture Proportion . The mixture proportion of the reference (REF) concrete is shown in Table 1 and was used as a baseline. To create the NEC mixture, 6.0 fluid ounces per ...

This study investigated the effect of colloidal nano-silica on concrete incorporating single (ordinary cement) and binary (ordinary cement + Class F fly ash) binders. In addition to the mechanical properties, the experimental program included tests for adiabatic temperature, rapid chloride ion permeability, mercury intrusion porosimetry, thermogravimetry and …

The objective of this investigation is to study the effect of nano-silica addition on the fresh and hardened properties of ultra high strength concrete. Nano-silica with 99.8% SiO2 content and ...

A detailed investigation was conducted to analyse the mechanical and durability features of a mixture of binary cement concrete modified with nanomaterials. In the context of the concrete matrix, the substitution of fractional cement content was carried out using Nano silica (NS) at concentrations of 1%, 2%, and 3%. Four distinct …

Nano-silica concrete: 0.40: 35 nm: Colloidal: With different doses of nano-silica, the overall performance of concrete was greatly improved. When nano-silica was added, the strength usually went up by up to 6% at all curing ages. Li et al. [142] Nano-silica concrete: 0.40: 640 ± 50 m 2 /g, 10 ± 5 nm: Powder: Adding nS increases …

The main properties are stated below: SiO2 Nanoparticles is transparent and its density is 2634 kg/m3. The molar mass of SiO2 is 60.0843 g/mol. The melting point is 1986 K, whereas the boiling point is 2503 K. Its crystal structure is Quartz, cristobalite or tridymite. Figure 1. Structure of Silicon Dioxide (SiO2)

For SCC with NS at 1%, 2% and 3% increases the strength up to 9.88%, 21.36%, and 5.63% at 28 days. The increase in the strength is due to enhanced particle packing density [130]. The efects of NS ...