Concrete that contains silica fume may be durable and could have good strength. Silica fume is acquirable from concrete admixtures providers and, when needed, it is just added into concrete ...
Controversy exists as to why silica fume increases the strength of concrete when it is used as a partial replacement for cement. Some evidence supports the view that the increase in strength is due to an increase in the strength of the cement paste constituent of concrete. However, contradictory evidence exists that shows no increase in the strength of …
The mix, which contains 80% coarser silica sand (TC) with 20% river sand, attained the maximum compressive strength of 34.5 Mpa and tensile strength of 3.5 Mpa at 28 days, which was the greatest ...
Specifically, CS treatment has been shown to increase unconfined compressive strength with time. However, limited knowledge exists regarding the performance of CS-treated soils after 1,000 days post treatment. This paper presents UCS test data for CS-treated sand samples of varying ages (freshly made and preserved …
Soft computing methods were used in this research to design and model the compressive strength of high-performance concrete (HPC) with silica fume. Box–Behnken design-based response surface methodology (RSM) was used to develop 29 HPC mixes with a target compressive strength of 80 ± 10 MPa. Cement (450–500 …
With the replacement of silica sand, combination between sand and geopolymer gel was formed, the geopolymers therefore showed compressive strength higher than 34 MPa with silica sand up to 50%.
The unique physical and chemical properties of silica fume enhance the compressive strength and water resistance of cement mortar. The study aims to investigate the effect of silica fume in cement mixes in terms of strength-gaining characteristics and water-resistance attributes. The silica fume was added in amounts …
This paper presents the effect of nano silica and fine silica sand on residual compressive strength of sodium and potassium based activators synthesised fly ash geopolymer at elevated temperatures. Six different series of both sodium and potassium activators synthesised geopolymer were cast using partial replacement of fly ash with 1%, 2%, …
Microbially-induced calcium carbonate precipitation (MICP) can enhance the stiffness and bulk strength of sand aggregates via calcium carbonate cementation. This study explores the mechanical strength of silica sand aggregates with different particle …
The mix, which contains 80% coarser silica sand (TC) with 20% river sand, attained the maximum compressive strength of 34.5 Mpa and tensile strength of 3.5 Mpa at 28 days, which was the greatest ...
The research explored the potential of waste plastics and silica sand for developing thermoplastic composite as floor tiles. The samples were characterized by …
Adding 11.11%–22.22% rice husk ash enhances the compressive strength of the cement. Pit sand is far better than sea sand for compressive strength enhancement. The rice husk ash impact on compressive strength can be defected by the source of sand used.
This paper elaborates the work of trying various binders with respect to compressive strength as it affects the ability of the mould to take the load of flowing molten metal and the solidified...
Flow values, compressive strengths (2, 7, 28, 90, 180 days) and sulfate resistance of mortars prepared from these 16 cements were determined. 50 × 50 × 50 mm cube mortar specimens were prepared by using 450 g cement, 1350 g standard sand and 0.5 water/binder ratio for determination of compressive strength of mortars.The …
By using fine aggregates, the st udy produced silica sand with a compressive strength of 409.21 . kg/cm 2 or 40.1 MPa with w/c ratio of 0.4 at 28 days of concrete age. The study becomes a ...
There is also an increase in the glass transition temperature and compressive strength, as well as a reduction in swelling in the solvents [99,110–112]. Silica is the main filler of …
This study explores the mechanical strength of silica sand aggregates with different particle morphologies and sizes following MICP treatment. Specifically, …
Curing temperature influences the microstructure and compressive strength of silica sand-enhanced cement by changing the quantity of micropores and small pores. The correlations among curing …
Table 4: Details of specimens with sea sand PERCENTAGE REPLACEMENT Table 6: Compressive strength of cube with sea sand Percentage Compressive strength of cubes in N/mm2 S. No. of sea sand 7days 14days 28days 1 0% 27.68 33.24 38.96 2 10% 27.72 35.4 40.1 3 20% 27.7 34.3 39 4 30% 25.1 32 36 OF OF SEA AGE OF SAND AS …
Although concrete utilization in the construction and building sectors is widespread in the world, the risk of concrete degradation, especially in harsh environments, still exists. This research deals with the impacts of adding silica fume (SF) into Portland cement on compressive strength and durability properties of concrete exposing to …
In short, 15% sand replacement of silica aerogel powder achieved the highest compressive strength at 7 days and considered as the optimum mix in this series of tests. 3.2 Flexural Strength Flexural or bending test was carried out based on …
Recycled coarse aggregate 1 (RCA) was treated with silica fume cement 2 (SFC) paste. Subsequently, specimens of two types of concrete were prepared: one with treated RCA 3 (TRCA) and another with natural coarse aggregate 4 (NCA) based on conventional concrete 5 (CC) mixture designs. The slump, cubic, and prism …
This study investigates the mechanical properties of high-strength self-compacting concrete (HSSCC) through rigorous laboratory testing. Six input parameters—cement, water-cement ratio, nano-silica percentage, fine aggregate, coarse aggregate and temperature—are analysed with compressive, flexural, and split tensile …
silica sand concrete is given in table 4.2. For finding the compressive strength cube specimens were tested at 7, 28 and 56 days. It is evident from this table that strength increases with addition of silica sand up to certain replacement levels (12%). After that it decreases. Table 4.2 Compressive strength of silica sand concrete S. No. f ...
2.4. Unconfined compressive strength testing. The binder (furfuryl alcohol), acid activator (p-toluene sulphonic acid) and whole grain silica sand (quartz) used in the following study was purchased from ExOne (PA, USA), the manufacturer of the M-Flex Sand Printer used to fabricate the model rock was already used for other studies [5], [6], …
Compressive Strength of MICP-Treated Silica Sand with Different Particle Morphologies and Gradings Chenpeng Songa,b,c, Chaoyi Wangd, Derek Elsworthb, and Sheng Zhib aKey Laboratory of Hydraulic ...
In contrast to PVA-ECCs, cracks in the matrix of PE-ECCs were found to pass through the coarse silica sand without any notable extension of the crack path, as depicted in Fig. 9 (b), owing to the strong adhesion between the matrix and silica sand, and the higher cracking strength of the matrix. In addition, when larger coarse silica sand …
In this study, portland cement (PC) has been partially replaced with a Class F fly ash (FA) at level of 70 % to produce high-volume FA (HVFA) concrete (F70). F70 was modified by replacing FA at levels of 10 and 20 % with silica fume (SF) and ground granulated blast-furnace slag (GGBS) and their equally combinations. All HVFA …
Resin-coated silica proppant can be used up to about 8,000 psi closure stress, improving fracture treatment results; ceramics made of aluminosilicates ores are …
The present research examines the compressive and tension strength of nano cement mortar by using micro cement, micro sand, nano silica and nano clay in developing a nano-cement mortar which can ...
The 2-day and 3-day compressive strength should be greater than 14 MPa. Meanwhile, the compressive strength for cement cured longer than 7 days should not show any …
Improvement of the unconfined compressive strength of 3D-printed model rock via silica sand functionalization using silane coupling agents Kevin J. Hoddera*, John A. Nychkaa and Rick J. Chalaturnykb a Department of Chemical and Materials Engineering, University of Alberta, Donadeo Innovation Centre for Engineering, 9211-116 Street NW, Edmonton ...
The compressive, split tensile, and ductility tests revealed that the fine aggregate of 25% sea sand + 50% river sand and 25% m-sand boosted the material's strength. When several conflicting goals, many influencing factors, and highly nonlinear constraints need to be addressed, these approaches are time and resource costly, and …
River sand passing through 4.75 mm IS sieve confining to grading zone III of IS:383-1970 was used. ... A study on the effect of nano silica on compressive strength of high volume fly ash mortars and concretes. Mater. Des., 60 (2014), pp. 433-442. View PDF View article View in Scopus Google Scholar [7]
