Nigeria is rich is solid mineral resources, such as: Kaolin, gypsum, mica, clay, tantalite, iron ore, gemstone, silica sand.
Read More
Recycling concrete &building rubble is not only able to bring profit to investors, but also good for environment protection.
Read More
By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
Read More
Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
Read More
Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
Read More
The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
Read More
Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
Read More
High strength concrete is a useful material for high-rise buildings, long-span bridges, heavy-duty industrial floors, pre-stressed …
Details
Concrete engineering series 82.Tokyo: JSCE, 2008 [12] Nawy E. G. Fundamentals of high strength high performance concrete.New York: Wiley, 2000 [13] Xincheng P. Super-high-strength high performance …
Details
High-performance concrete (HPC) is produced by careful selection and proportioning of its constituents namely cement, sand, gravel, cementitious materials such as fly ash; silica fume; and slag, and chemical …
Details
This paper reports the results of an experimental study on the high performance concrete made with copper slag as fine aggregate. The percentage of Copper Slag(CS) added by weight in a range viz. 0, 25, 50, 75 and as a replacement of sand used in concrete and cement was replaced with 15% Metakaolin.
Details
These admixtures reduce the water content without compromising workability. Effect on Concrete: Enhances workability, reduces water-cement ratio, improves strength and durability. Usage: Suitable for high-strength concrete, precast applications, and situations requiring improved workability without excessive water. Hoover Dam
Details
PDF | For many years, High performance concrete (HPC) is the innovative type of concrete. ... The adding of these admixtures on the HPC has been investigated. ... Strength of the concrete can be ...
Details
The present work reviews the various mineral admixtures used in concrete which modifies the concrete properties. In this study, cement is partially or completely replaced by different mineral admixtures such as fly ash, silica fume, rice husk ash, Ground Granulated Blast Furnace Slag, palm oil fuel ash and metakaolin. The strength obtained …
Details
Mid-range water-reducing admixtures were developed to increase the slump beyond the range available with regular water reducers without the excessive retardation that had been known to occur. High-range water reducers, commonly called superplasticizers, were developed for high-strength and high-performance concrete …
Details
Researchers in the field of concrete technology with the application of different admixtures are always in search of suitable admixtures to improve the workability as well as the strength of any ...
Details
Sika provides a wide range of concrete admixtures with innovative options for concrete mix design, whether it's for substantially reducing the water content of a mix (e.g. with Sika® ViscoCrete), using a more economical …
Details
Concrete admixtures (additives) enhances the properties of concrete for applications in construction with special requirements. Concrete additives are used to achieve desired workability in case of low water cement …
Details
Design of Concrete Mix Mean strength = (50 / 0.80) = 63 MPa Reference number (fig.1)= 25 Water cement ratio (fig 5) = 0.35 For a 10mm maximum size aggregate and very low workability, the aggregate-cement ratio for the desired workability (table-1) =3.2 The aggregates are combined by the graphical method as shown in figure 6, so that 30 …
Details
This is where concrete admixtures play a crucial role. Concrete admixtures are materials that improve the properties of concrete. By adding different types of admixtures, concrete's workability, strength, durability, and other properties can be adjusted to meet various engineering needs. ... such as high-strength and self-compacting concrete ...
Details
If high early strength is required, it can often be achieved by modifying an existing mix design to incorporate: (1) Type III rather than Type I or Type II portland cement; (2) …
Details
One of the primary objectives of ACI Committee 363 during the last few years has been to update and republish document 363R, High-Strength Concrete. This synopsis is based on a full report on high-strength concrete to be published by ACI Committee 363 (High-Strength Concrete). Estimated publication time for the new document is early 2006.
Details
The behavior of specimens cast with medium strength concrete and high strength concrete with and without admixtures are compared with respect to ultimate strength, workability and cracking.
Details
Basalt and quartz powder were used as an aggregate in the mixtures. Three different curing methods (standard, autoclave and steam curing) were applied to the specimens. Test results indicate that high strength concrete can be obtained with high volume mineral admixtures. Compressive strength of these mixtures is over 170 MPa. …
Details
The high early strength concrete is achieved through the use of one or combination of type III Portland cement, high cement content, low water to cementitious materials, high freshly mixed concrete, chemical admixtures, supplementary cementitious materials, autoclave curing, and insulation of concrete to retain its heat of hydration.
Details
Therefore this silica fume mixing method was used in all further investigations. 4. High-strength concrete with complex admixtures According to the investigation results high-strength concretes have been produced by using naphthalene form- aldehyde or melamine formaldehyde superplasticizers, plasticizers on lignosulfonates base and silica fume.
Details
based, high performing, water-reducing concrete admixtures. From conventional to high-strength, self-consolidating concrete, our ViscoCrete® products …
Details
work was capable of producing HSC flow able concrete with a compressive strength over 50 MPa using locally available raw materials and classical concrete production methods without any adverse effect on fresh concrete. High strength concrete ingredients: a) Class F FlyAsh:Class F fly ash is available in the largest quantities. Class F is ...
Details
EARLY AND HIGH STRENGTH CONCRETE STRENGTH IN CONCRETE IS REFERRED TO AS "INITIAL/EARLY STRENGTH" OR "ULTIMATE / HIGH STRENGTH". The critical factors influencing the strength of the concrete are: ́ The type of cement ́ The concrete admixtures ́ The concrete temperature ́ The water/cement ratio
Details
Concrete Admixtures - Set Retardant Time: 02:27 ... High strength concrete; Corrosion protection; Set acceleration; Strength enhancement; Set retardation; Crack control (shrinkage reduction) Flowability; Finish enhancement; Fly ash: Making concrete stronger, more durable, and easier to work with;
Details
This paper presents the result of mix design developed for high strength concrete with silica fume and High range water reducing admixture (HRWR). It involves the process of determining experimentally the most suitable concrete mixes in order to achieve the targeted mean strength. In this research work 53 grade ordinary Portland cement, the …
Details
Admixtures (concrete admixtures) can be used for the following purposes:. Functions of Admixtures. Concrete admixtures have various functions and they are as follows: (a) To increase the rate of strength development at early ages – calcium chloride is the most widely used accelerator,
Details
High-strength concrete (f'c>50 MPa) is a more brittle construction material than normal strength concrete. High-strength concrete sections show a steeper softening slope when compared with similar ...
Details
The use of different admixtures in concrete gives a high performance in concrete construction. The mechanical properties such as compression, split tensile strength and flexural strength are determined on 28 day. ... Journal of Construction and Building Materials, 21: 1589-1598. Shannag, M. J. 2000. High Strength Concrete Containing …
Details
The age at which concrete must develop its high strength is an important factor in the design of a mix. If high early strength is required, it can often be achieved by modifying an existing mix design to incorporate: (1) Type III rather than Type I or Type II portland cement; (2) additional cement; (3) an accelerator, such as calcium chloride; and/or (4) a water …
Details
Discover how concrete admixtures can improve the performance and durability of construction projects. Explore various types of admixtures and their …
Details
This study presents an experimental investigation on self-compacting concrete (SCC) with fine aggregate (sand) replacement of a Quarry Dust (QD) (0%, 25%, 50%, 75%, ) and addition of mineral admixtures like Fly Ash (FA) and Silica Fume (SF) & chemical admixtures like super plasticizers (SP).
Details
The best concrete C60, which is the high performing concrete (Rolander, 2019) indicate that as the concrete grade increase the total cost of building, construction period, the column size and ...
Details
They concluded that the addition of mineral admixtures increased the compressive strength of concrete produced with lightweight expanded perlite aggregate. Altun and Haktanir [5] suggested that structural lightweight concrete (SLWC) and normal weight concrete (NWC) be used together in composite reinforced concrete members. …
Details
3,000-pound concrete is concrete with a compressive strength of 3,000 pounds per square inch (PSI) at the 28-day mark. Other strengths may also be specified. High-strength concrete typically has a strength of 8,000 psi (55 MPa) or greater.
Details
The general effect of SF, MK, FA and GGBS is to retard the setting times of high-strength concrete. 3. The SRA has negligible effect on the setting times of normal strength concrete, but it has a significant retarding effect when used in combination with a superplasticiser in high-strength concrete. 4.
Details
Sofol is a well-known crusher and grinding mill manufacturer that offers equipment and solutions for customers from aggregates, mining and mineral grinding industry.
You can leave your message here, we'll send you an Email immediately.
Online ChatCopyright ©2000- 2024 Shanghai Sofol CompanySitemap
PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
GET QUOTE