Assessment of Sorptivity and Water Absorption of …
50% of nano sized cement, fly ash and silica fume. Materials were converted to nano size by grinding in ball milling machine and its particle size was determined by scanning electron ... the mineral and the chemical admixtures used in concrete. The transport of moisture in to concrete by capillary action is also considered
Effect of nano-clay on the freeze–thaw resistance of self …
In this paper, the fabricated self-compacting concrete (SCC) specimens containing different portions of nano-clay (NC) and mineral admixtures including silica fume (SF), fly ash (FA), rice husk ash (RHA) and ground granulated blast furnace slag (GGBFS) were subjected to F-T cycles in the temperature range of −18 to +4 °C …
RILEM TC 277-LHS report: additives and admixtures for …
The scope of this collective paper produced in the frame of RILEM TC 277-LHS is to provide sound knowledge on the use of additives/admixtures in lime-based mortars, based on literature and practice. The most widely known additives/admixtures are systematically presented. Their main effects and testing of their performance have been …
Enhancing high-strength self-compacting concrete …
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 …
The influence of mineral admixtures on the short and long …
To prepare cementitious composites with higher strength and toughness, researchers have developed many different strengthening methods, such as nano modification technology [6], adding admixtures ...
Rheological behavior of high performance concrete with mineral
The MR fluid (magneto-rheological fluid) is a suspension of micron sized magnetizable particles in a carrier fluid ... To take the advantage of different rheological parameters with various mineral admixtures, attempt was made to investigate rheological behavior of concrete with ternary blends such as PFA–RHA, PFA–CSF and CSF-RHA. …
Effect of Grinding on Strength and Durability of …
nano-sized mineral admixtures was also studied on self-compacting concrete using SiO2, Fe2O3, ZnO2 and TiO2 (Nazari and Riahi, 2010, 2011a, 2011b, 2012a, 2012b; Riahi and Nazari, 2011). In addition, the effects of several types of nano-particles on the properties of concrete specimens cured
Augmented Properties of High Strength Self Compaction …
The construction industry continually evolves to meet the demand for more robust, durable, and sustainable concrete structures. To improve the mechanical and durability qualities of High-Strength Self-Compacting Concrete (HSSCC), this study examines the application of nano minerals as a partial substitution for cement. Fly ash, Silica Fume, …
Experimental study on mechanical properties of concrete using mineral
Mineral admixtures are added to concrete to make it more robust and long-lasting [7]. Precast elements made from high performance concrete have the same improved qualities as the originals. Filler and chemical admixtures are common components of high-performance concrete. As a result, the hydration rate of cement and …
Effect of nano-clay on the freeze–thaw resistance of
The effects of nano-clay (NC) addition on fresh state, mechanical, and durability properties of plain and blended cement self-consolidating concrete (SCC) incorporating mineral admixtures as ...
Admixtures in Cement-Matrix Composites for Mechanical …
Cement paste is composed of small grains of the C–S–H, capillary pores (whose diameter falls in the order of the microns), nano-sized individual pores, and large crystals of hydrated products. There is room, therefore, for micro-sized pozzolanic particles to fill such pores and to make the cement product more compact [ 95 ].
Individual and Combined Effect of Nano- and Microsilica
These properties were improved using micro- and nano-sized pozzolanic mineral admixtures as stated by various authors. In this paper, author has emphasized mostly on using micro- and nanosilica ...
Materials | Free Full-Text | Preparation of Nano-Sized C-S-H …
Nano-sized C-S-H, a promising early strength agent, can accelerate the hydration rate of Portland cement and increase the early compressive strength of cement-based composites effectively. Nano-sized C-S-H suspensions with different contents of effective constituent and size distributions were prepared by a convenient coprecipitation …
Types of Admixtures for Concrete
Type G: Water-reducing, high range, and retarding admixtures. Note: Changes occur in the admixture industry faster than the ASTM consensus process. Shrinkage Reducing Admixtures (SRA) and Mid-Range Water Reducers (MRWD) are two areas for which no ASTM C494-98 specifications currently exist. Featured Products.
Study of flexural strength of concrete containing mineral admixtures
The effect of the three supplementary cementitious materials on the flexural strength of concrete can be summarized as the correlation with flexural strength fluctuates at small admixtures (FA_con ...
Performance of Portland cement pastes containing nano …
The use of both chemically active or inert mineral admixtures to cement-based materials has grown during the last few decades due to their technical advantages (increase in strength and durability) and environmental (associated to the reduction in cement consumption). ... Mechano-chemical changes of nano sized α-Al 2 O 3 during …
Experimental investigation on the strength and
Mineral admixtures. 1. Introduction. These days the demand for concrete has been increasing expeditiously in the construction of highways, buildings, bridges etc. all over the world. Only cement is a material that is served as a binder in concrete and provides strength to the concrete structure. ... Int. J. Smart Nano Mater., 7 (1) (2016), pp ...
Augmented Properties of High Strength Self Compaction …
- The construction industry continually evolves to meet the demand for more robust, durable, and sustainable concrete structures. To improve the mechanical and durability qualities of High-Strength Self-Compacting Concrete (HSSCC), this study examines the application of nano minerals as a partial substitution for cement. Fly ash, …
Buildings | Free Full-Text | Influence of Mineral Admixtures …
Pervious concrete is an innovative eco-friendly construction material. Through the application of mineral admixtures and microscopic analysis to optimize its performance and analyze its mechanisms, its traits as a sustainable building option may be further improved. This study primarily examines the impact of the optimal blend quantities …
Effects of Nano-CSH on the hydration process and mechanical property …
The obtained results show that the used nano-CSH can promote the hydration of tricalcium silicate (C 3 S), and is more active on the hydration of tricalcium aluminate (C 3 A) in the samples with GGBFS. The presence of nano-CSH can definitely accelerate the secondary hydration reaction of mineral admixtures.
Sustainable ultra-high performance concrete with incorporating mineral
This paper evaluates the influence of mineral admixtures partially replacing cement, sea sand replacing quartz, sea water replacing fresh water on ultra-high performance concrete (UHPC). The fluidity and mechanical properties were studied. Besides, the impermeability, chloride resistance and freeze-thaw resistance were …
A Review on Performance of Self-Compacting Concrete – Use of Mineral
Nano clays can improve the concrete (self-consolidating) green strength for lower slip and pressure. ... hybrid steel fibres concrete has increasing energy dispersal limit than single sized fibres, concrete, for UHPFRC [72]. ... it is observed that the usage of steel fibres along with mineral admixtures had enhanced the performance of the SCC ...
(PDF) Effects of Nano-CSH on the hydration process and …
This paper studied the effects of nano-CSH on the hydration behavior and compressive strength of cementitious materials with various mineral admixtures. Isothermal calorimetry test was used to ...
Hydration behavior of calcium aluminate cement mortars with mineral
Cement-based materials that are produced with calcium aluminate cement (CAC) exhibit severe strength losses with time and temperature due to the conversion of metastable hydrates (CAH 10 and C 28) into the stable hydrates (C 36 and3).On the other hand, using mineral admixtures at different ratios during the production …
Steam-cured concrete incorporating mineral admixtures
Nano-sized C-S-H with semi-crystalline structures was prepared, and the size of the nano-sized C-S-H seeds showed an obvious increase with an increase in theoretical concentration, and slight ...
Influence and mechanism of micro/nano-mineral admixtures …
The abrasion resistances of concrete in which the cement was partially replaced by 40 wt% super fine slag (SFS), 5 wt% nano-SiO2 (NS), 5 wt% NS and 25 wt% fly ash (FA) were tested.
Influence and mechanism of micro/nano-mineral admixtures …
The abrasion resistances of concrete in which the cement was partially replaced by 40 wt% super fine slag (SFS), 5 wt% nano-SiO 2 (NS), 5 wt% NS and 25 wt% fly ash (FA) were tested. Mechanisms responsible for the affection of these micro/nano-mineral admixtures on the abrasion resistance of the concrete were analyzed through …
Preparation of Nano-Sized C-S-H and Its Acceleration …
2.1. Raw Materials. Analytical Ca(NO 3) 2 ·4H 2 O, Na 2 SiO 3 ·9H 2 O and NaOH were provided by China National Pharmaceutical Group Co., Ltd. Polycarboxylate dispersant (PCE) was selected as dispersant for the preparation of nano-sized C-S-H suspensions. P·O52.5R cement and IOS sand were selected to prepare pastes and …
Mechanical properties of engineered cementitious …
Ajith G, Shanmugasundaram N, Praveenkumar S (2021) Effect of mineral admixtures and manufactured sand on compressive strength of engineered cementitious composite. ... Hisseine OA, Tagnit-Hamou A (2020) Characterization and nano-engineering the interface properties of PVA fibers in strain-hardening cementitious composites …
Effect of nano-silica on rheology and fresh properties
Typical properties affected by nano-sized particles or voids are strength, durability, shrinkage and steel-bond [4]. Nano-particles of SiO 2 (nS) can fill the spaces between particles of gel of C–S–H, acting as a nano-filler. Furthermore, by the pozzolanic reaction with calcium hydroxide, the amount of C–S–H increases, resulting a ...