(PDF) Ultrafine portland cement performance

Two Portland cement replacement ratios of 4% and 10% of silica fume were selected and added by means of a mechanical blending method. The results revealed that the effect of the finer silica fume ...

Ultrafine grinding of fly ash with grinding aids: Impact on …

The grinding experiment of fly ash was carried out by using laboratory ball mill. The type of the ball mill is Ф500 mm × 500 mm, 48 r/min and closed circuit, and the grinding media is composed by 60 kg steel balls (Φ40 mm, Φ50 mm, Φ60 mm and Φ70 mm) and 40 kg small steel forgings (Φ25 mm * 35 mm).The weight of materials for each grinding …

Development of high-performance concrete using ultrafine …

Results reveal that 5% replacement of cement by ultrafine flyash is the most desirable amount which can satisfy the criteria according to various Indian standard codes. Further, other strengths and durability tests were performed on desired concrete. The results show that desired concrete satisfies all the criteria and used in the development ...

Soil Solidification with Ultrafine Cement Grout | Request PDF

Ultrafine cement grouts have also better flow properties and bleed characteristics than OPC grout (De Paoli et al., 1992;Schwarz and Krizek, 1994; Warner, 2003). Although the cost of ultrafine ...

Development and application of novel high‐efficiency …

Ultrafine cement, ultrafine fly ash, ultrafine slag, and additives (superplasticizer, AUA, gypsum, and retarder) are used to develop highly efficient composite ultrafine cement (CUC). ... The microstructure of the UC 1 sample gradually becomes dense, and the C–S–H gels adhere to the needle–rod AFt (Figure 9d). Under the action …

Effect of Ultrafine Additives on the Morphology of …

Crystals 2021, 11, 1002 2 of 21 effects of ultrafine additives on the morphology of cement hydration products [1–13]. The setting of favorable conditions for effective hydration can be reached ...

Ultrafine Cement Grouting | Geo Grout Ground Modification …

Ultrafine cement grouting have a substantial advantage over other chemical grout methods. Listed below are some applications that commonly used Ultrafine …

Review on Performance Evaluation of High-Performance Concrete …

This study aims to investigate the effects of incorporating ultrafine mineral admixtures on the properties of High-Performance Concrete (HPC). The research examines the performance enhancements achieved through the addition of these admixtures, focusing on aspects such as compressive strength, durability, workability, and microstructural …

(PDF) Effect of Ultrafine Additives on the Morphology of Cement …

The present research is focused on the investigation of the influence of ultrafine additives on the structure formation of hardened cement paste and the establishment of the mechanisms of the ...

PVA fiber-reinforced ultrafine fly ash concrete

A K-II high-strength and high-elastic-modulus bundle monofilament PVA fiber developed by the Kuraray Company in Japan was used, as shown in Fig. 1 (d). The performance indices are listed in Table 2.The American Concrete Association (ACI) report ACI 544.1R-96 [57] recommends the use of a fiber volume ratio less than 2%.JING Yu …

Cementitious Ultrafine Pozzolanic Grouts from U.S. Grout

UNIQUE AMONG THE CEMENTITIOUS GROUTS produced in the world today, US Grout Ultrafine™ is strengthened and made exceptionally enduring with the same pumice-based pozzolan technology the Romans used in their concrete over 2000 years ago. Developed by the U.S. Department of Energy, US Grout Ultrafine™ products are typically superior …

ULTRAFINE CEMENT: A CRITICAL COMPONENT OF A …

Ultrafine is considerably more expensive, but it has key advantages, including a reduced need for overall cement use, improved groutability and reducing delays by mitigating …

Soil Solidification with Ultrafine Cement Grout

Ultrafine cement can be of any one of three different origins, including common portland cement, slag based cement, and a combination portland-pozzolan blend. However, there are fundamental differences in the penetrability of grout derived from the cement of these different origins. Extensive research and experience has shown the …

Ultrafine Cement in Pressure Grouting | Semantic Scholar

IUltrafine Cement in Pressure GroutingN presents the technical and practical information required by engineers to plan and implement grouting programs that are cost effective and technically sound. As a key component of modern grouting programs, ultrafine cement is an ideal solution for geotechnical engineers and construction …

Experimental characterization of binary and ternary blended-cement …

The ultrafine SCBA presented a median particle size of 2.7 μm, pozzolanic activity index with cement of and Chapelle activity of 279 mg/g. The ultrafine RHA presented a median particle size of 4.3 μm, pozzolanic activity index with cement of 109% and Chapelle activity of 736 mg/g.

Stabilization of clayey soil using ultrafine palm oil fuel ash …

Compaction was conducted manually by a 45 mm diameter steel rod to eliminate air pockets, so as to improve the ... The positive findings of this research work proved the existence of a combined action among the pozzolanic reaction of ultrafine POFA and hydrolysis of the cement in clayey soil stabilization. These findings can help …

Ultrafine Grout Supplier

Ultrafine Grout is composed of a finely ground mixture of Portland cement, pumice pozzolan, and dispersant. Ultrafine cementitious grout has an average particle size of 3 microns, in stark contrast to typical particle sizes of …

ULTRAFINE SD™

Ultrafine cementitious grouts are composed of a finely ground mixture of Portland cement, pumice pozzolan, and dispersant. Avanti's Ultrafine grout has an average particle size of …

Densified cement ultra-fine particle-based materials

@misc{etde_10168064, title = {Densified cement ultra-fine particle-based materials} author = {Bache, H H} abstractNote = {This paper describes a new class of materials with binders of densely packed cement and ultra-fine particles arranged in the spaces between the cement. The new materials are shaped from a viscous mass in a low stress field - in …

Performance improvement to ash-cement blocks by adding ultrafine …

Steel slag was first broken below 5 mm with a jaw crusher (PEF 100 × 60). Then, it was ultrafine smashed with a supersonic steam-jet crusher (S-FW 200), as shown in Fig. 1.This was a continuous process: the steel slag was first transferred to the silo with a hooper; it was then loaded into the smashing chamber; finally, it was entrained with the …

ULTRAFINE CEMENT

ULTRAFINE CEMENT Specific Gravity Particle Size D95 Particle Size D50 Initial Set Time Final Set Time Bleeding in 2 hours UCS (σ3) UCS (σ7) UCS (σ28) *UCS measured in accordance with JIS-R5201 : 3.00 g/cm³ : 10 µm : 4 µm : 8 - 16hours : 10 - 22 hours : 1 - 3%

Hydration of ultrafine and ordinary Portland cement at early …

The ultrafine cement consistently produces higher gel/space ratios at all seven testing ages. At an age of 1 day, the ordinary Portland cement achieves 79% of its fine counterpart. Experimental results of a quantitative of the hydration of ultrafine and ordinary Portland cement pastes were presented in this paper. The degree of hydrat

Experimental Study on the Mechanical Performance of …

An experimental investigation was conducted in order to understand properties of grouts and grouted specimens. Three different cement types, i.e., composite ultrafine cement (CUC) that was independently developed, ultrafine cement (UC), and Portland cement (PC) were injected into broken red sandstone specimens on the basis …

Mechanism of regulating the mechanical properties and

The production of 1 t of ultrafine powder is cost-effective, approximately 200 RMB, while simultaneously reducing CO 2 emissions by about 600 kg compared to the traditional Portland cement production. Overall, this study highlights the potential of these composite solid waste-based regenerated ultrafine cementitious materials as a …

Development of defects detection system for ultrafine

In order to avoid low defect detection efficiency and high false detection rate by eye inspection, a defect detection system used for ultrafine cemented carbide rods inspection based on eddy ...

(PDF) Effect of Ultrafine Additives on the Morphology of Cement …

of cement result, the presence of ultrafine The observed changesadditives leads to changes in the morphology in the morphology of hardened cement paste of cement hydration, the character of their intergrowth causing compaction in case of its modification with ultrafine additives of different origins are presented in of the structure of the6 ...

Performance evaluation of ultrafine cement as a grout for …

Although Ordinary Portland Cement (OPC) has been widely used as one of the significant grouting materials, there are many drawbacks to its application in the field. …

Exploring the Influence Factors of Early Hydration of …

ciple of accumulation effect, ultrafine cement has the function of filling the pores and making the cement stone more compact [15]. Under the condition of the same particle size, the particle morphology also affects the working performance of ultrafine cement [16]. To sum up, ultrafine cement work performance is related to a variety of factors ...

Microstructure engineering of Portland cement pastes …

When nuclear fuel rods become depleted, the primary storage solution in the United States is steel-lined pools, where the rods decay for a number of years, then are transferred to concrete dry ...

Use of Ultrafine Slag in High Strength Concrete

This paper presents the effect of Ultrafine Slag in high strength concrete with cement replacement of 5%, 10%, 15% and 20%. Nowadays high strength concrete generally made with Ordinary Portland Cement. In this investigation Portland Pozzolana Cement (PPC) Fly ash based was used to make concrete more environmental friendly. In this experiment …

Application of an industrialized ultrafine composite powder in cement …

Ultrafine GGBS with average particle size of 4–6 μM was introduced as a replacement mineral admixture (10%) to ordinary Portland cement while calcium nitrate was introduced as a chemical ...

Hydration characteristics of cement with high volume …

Needle rod-like AFt, hexagonal plate-shaped Ca(OH) 2 and gel-like C-(X)-S-H (X stands for Ca, Al or Mg) ... The three types of fly ash are inert in the accelerated hydration period of cement, but ultrafine grinding increases the content of UCFBFA in cement to 50 wt%, and the strength reaches the level of pure cement in the later stage. ...

(PDF) Experimental Study on the Mechanical Performance

An experimental investigation was conducted in order to understand properties of grouts and grouted specimens. Three different cement types, i.e., composite ultrafine cement (CUC) that was ...

Development and application of novel high‐efficiency …

The aim of this study is to develop highly efficient composite ultrafine cement (CUC) grouts to reinforce the roadway in fractured surrounding rocks. The materials used …

Ultrafine Cement in Pressure Grouting

Grouting and Ground Treatment, edited by Lawrence F. Johnsen, Donald A. Bruce, and Michael J. Byle (ASCE Proceedings, 2003). Reviews state-of-the-art methods and …

Strength and permeability of boric acid-tempered ultrafine cement

In this research, the groutabiliy of ultrafine cement (Ufc) grouts containing an additive of boric acid (BA) into the sand specimens with different particle size distribution and the engineering properties of grouted specimens were investigated. ... Thereafter the top and the bottom end-plates of molds were tied together through rods as shown ...

Performance improvement to ash-cement blocks by adding ultrafine …

Commercially available P.O32.5 ordinary Portland cement was used as a base material. The chemical analysis of the fly ash, cement, and steel slag are reported in Table 1. Ultrafine smashing of steel slag. Steel slag was first broken below 5 mm with a jaw crusher (PEF 100 × 60). Then, it was ultrafine smashed with a supersonic steam-jet

Performance evaluation of ultrafine cement as a grout for …

Although Ordinary Portland Cement (OPC) has been widely used as one of the significant grouting materials, there are many drawbacks to its application in the field. In this study, an ultrafine cement mixed with an expansive agent is proposed as a new grout material by extensively examining its characteristics and performance over conventional …