Production of High Strength Pastes, Mortars, and Concretes

1984 ◽  
Vol 42 ◽  
Author(s):  
Ramon L. Carrasquillo
Keyword(s):  
High Strength Concrete ◽  
Heterogeneous Material ◽  
High Strength ◽  
Materials Selection ◽  
Cement Pastes ◽  
Relative Contribution ◽  
Concrete Production ◽  
Conventional Production ◽  
Production Techniques ◽  
Selection Of

AbstractFor concrete, a grossly heterogeneous material, guidelines for selection of materials for its production, especially high strength concrete, should consider the interactions of its different components under load. Materials selection and production techniques for achieving concretes, mortars and cement pastes with strengths in excess of 10,000 psi are discussed. Emphasis is placed on the production of concretes having a compressive strength in the range of 10,000 to 15,000 psi using readily available materials and conventional production techniques. Emphasis is placed on the practical and technical significance of the factors involved in the selection of the materials and their proportions to achieve uniform, economical, high quality concrete. Selection of the concrete ingredients and their proportions is discussed in terms of their relative contribution to the compressive and flexural strength, elastic properties and observed failure mode of the paste, mortar and concrete. Production of concretes having compressive strengths in excess of 15,000 psi using exotic materials and special production techniques is also discussed.

scholarly journals Study on Mix Proportion Optimization of C50 High Strength Concrete

2021 ◽  
Vol 2101 (1) ◽  
pp. 012068
Author(s):  
Yunhua Wang ◽  
Fanji Cai ◽  
Qiong Wang ◽  
Dongfeng Li ◽  
Pan Guo
Keyword(s):  
Fly Ash ◽  
High Strength Concrete ◽  
Mechanical Performance ◽  
High Strength ◽  
Economic Costs ◽  
Engineering Technology ◽  
Strength Concrete ◽  
Mix Proportion ◽  
C 50 ◽  
Selection Of

Abstract With the progress of engineering technology, C50 high-strength coagulation came into being for the needs of actual engineering. This research mainly focuses on the selection of cement varieties and admixtures of C 50 high-strength concrete, so as to realize the optimization research of the mix ratio of C 50 high-strength concrete. The results show that ordinary P.O 42.5 and fly ash admixture can increase the mechanical performance of concrete. However, the concrete compressive strength with the mixed admixture of fly ash and mineral powder is even lower than that without any admixture. On the premise of meeting actual engineering needs, the optimization of the mix ratio of high-strength concrete can not only achieve sustainable development, but also save investment in project economic costs.

scholarly journals A new area of ​​application and research in bio-processes: Biotechnologies in civil construction

Bionatura ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 1072-1077
Author(s):  
A. Barberán ◽  
D. Chávez ◽  
A. Cajas ◽  
MC Egas ◽  
M. Criollo ◽  
...  
Keyword(s):  
Construction Industry ◽  
New Technologies ◽  
Low Cost ◽  
Construction Materials ◽  
New Methods ◽  
Engineering Discipline ◽  
Concrete Production ◽  
Conventional Production ◽  
Cement And Concrete ◽  
Selection Of

Construction Biotechnology is a new scientific and engineering discipline that has been developing exponentially during the last decade. The main directions of this discipline are 1- the selection of adequate microorganisms, 2- development of micro-processed construction bioprocesses as well as 3- the development of new biotechnologies to produce construction biomaterials. Products resulting in construction biotechnologies are low-cost, sustainable, and environmentally friendly microbial biocements for the improvement of the construction terrain. The bioagents used in construction biotechnologies are pure or enrichment cultures of native microorganisms or microorganisms isolated and activated from the soil. Biotechnologically produced construction materials and microbial mediated construction technologies have many advantages compared to conventional construction materials and processes. The current technological landscape offers an objective vision and perspective of how microbes are used in the construction industry as additives for cement and concrete so that these new technologies be used in different provinces of Ecuador. In that sense, the current situation of cement and concrete production in Ecuador is briefly described to have an overview of the applicability of the new methods based on biogenic materials and the environmental advantages of the creation of construction biomaterials over conventional production.

Design of High-Strength Concrete for Ready-Mixed Concrete Production

2021 ◽  
Vol 325 ◽  
pp. 113-118
Author(s):  
Martin Ťažký ◽  
Klára Křížová
Keyword(s):  
Compressive Strength ◽  
Construction Industry ◽  
High Strength Concrete ◽  
High Strength ◽  
Cement Composite ◽  
Cement Composites ◽  
Strength Concrete ◽  
High Rise ◽  
Concrete Production ◽  
Ready Mixed Concrete

The high-strength concrete is a cement composite reaching high compressive strength, namely, pursuant to the legislation, higher than 60 MPa in the terms of cube compressive strength. The development of high-strength concretes exceeding 100 MPa is still an up-to-date issue and the production of these concretes is still limited only to a prefabrication. Contemporary construction industry and projecting activity have begun to focus on a construction of statically demanding buildings, which can include e.g. high-rise buildings. Such projecting often requires using of the state-of-the-art materials like cement composites with high mechanical parameters for construction of more subtle buildings. Within this article, the procedure of ready-mixed concretes development with the compressive strength around 100 MPa designed according to a project documentation for actual construction of high-rise building with the height up to 160 meters and 46 floors is described, together with the influence of the aggregate on the resulting composite strength.

scholarly journals PENGARUH PEMBERIAN PERAWATAN STEAM CURING TERHADAP KEKUATAN DAN DURABILITAS BETON DENGAN SEMEN POZZOLAN (EFFECT OF STEAM CURING ON STRENGTH AND DURABILITY CONCRETE WITH CEMENT POZZOLAN)

2013 ◽  
Vol 9 (2) ◽  
Author(s):  
Erwin Rommel
Keyword(s):  
Compressive Strength ◽  
Fast Food ◽  
High Strength Concrete ◽  
Precast Concrete ◽  
High Strength ◽  
Steam Curing ◽  
Strength Concrete ◽  
Concrete Production ◽  
Porosity And Permeability ◽  
Cement Strength

The use of concrete as a building material has been developed both in quantity and qualityaspects. Concrete production time is long term in a foundry to make many breakthroughs to makea concrete material that fast food, such as precast concrete. The use of precast concrete in the areaof an aggressive environment than expected strength factors are also needed high durability,including resistance to porosity and permeability properties of concrete.This research was conducted with the cooperation of one of Precast Concrete Factory in EastJava, including the manufacture of 15x15x15 cm cube of concrete and steam curing system.Thisvariable on research ; use the type of cement (pozzolan cement and cement type-1), the length ofsteam (5 and 7 hours), and the quality concrete (K350 and K700). As for the testing performed oncompressive strength, permeability and porosity of concrete.This study concluded that steam curing system to provide early strength concrete that isbetter than conventional curing (non-steam), where compressive strength of the post-steam canreach 51% of high-strength concrete (K700) with the results 361 kg/cm2, whereas in normalconcrete (K350) reached 52% (compressive strength 192 kg/cm2). Pozzolan cement concrete alsohas the advantage in increasing the durability of concrete, especially in high-strength concrete,where the concrete porosity becomes smaller either by steam curing and non-steam. Permeabilityof concrete is given a steam becomes smaller than the normal concrete with conventional curing(non-steam).Key word : steam curing, pozzolan cement, strength of concrete

Development of Green High Performance Concrete

2013 ◽  
Vol 634-638 ◽  
pp. 2672-2675
Author(s):  
Zhen Rong Lin ◽  
Tao Zhang ◽  
Yun Yun Xu
Keyword(s):  
Mechanical Properties ◽  
High Strength Concrete ◽  
High Performance ◽  
Building Materials ◽  
High Performance Concrete ◽  
High Strength ◽  
Current Development ◽  
Green Concrete ◽  
The Past ◽  
Concrete Production

As the world's largest building materials production, the mechanical properties of concrete prominent and construction is simple, inexpensive features. Concrete production and construction sectors also exists a very serious problem of environmental pollution, people have to consider how to enhance the environmental protection of concrete, namely, the production and use of "green concrete". Since the past one-sided pursuit of high strength concrete, while ignoring the the durability issues brought a series of questions, allowing people to put forward the concept of a high-performance concrete. The paper by exploring the current development of high-performance green concrete, summary of the proposed method to achieve green high performance concrete.

scholarly journals Impact strength and abrasion resistance of high strength concrete with rice husk ash and rubber tires

2013 ◽  
Vol 6 (5) ◽  
pp. 811-820 ◽  
Author(s):  
M. B. Barbosa ◽  
A. M. PEREIRA ◽  
J. L. Akasaki ◽  
C. F. Fioriti ◽  
J. V. Fazzan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
High Strength Concrete ◽  
Rice Husk Ash ◽  
High Strength ◽  
Lower Mass ◽  
Strength Concrete ◽  
Concrete Production ◽  
Energy Absorbing ◽  
Construction Works

The paper discusses the application of High Strength Concrete (HSC) technology for concrete production with the incorporation of Rice Husk Ash (RHA) residues by replacing a bulk of the material caking and rubber tires with partial aggregate volume, assessing their influence on the mechanical properties and durability. For concrete with RHA and rubber, it was possible to reduce the brittleness by increasing the energy absorbing capacity. With respect to abrasion, the RHA and rubber concretes showed lower mass loss than the concrete without residues, indicating that this material is attractive to be used in paving. It is thus hoped that these residues may represent a technological and ecological alternative for the production of concrete in construction works.

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