Admixtures for concrete

Part 1 of ebook "Design and control of concrete mixtures: The guide to applications, methods, and materials (Fifteenth edition)" provides readers with contents including: Chapter 1 - Introduction to concrete; Chapter 2 - Sustainability; Chapter 3 - Portland, blended and other hydraulic cement; Chapter 4 - Supplementary cementitious materials; Chapter 5 - Mixing water for concrete; Chapter 6 - Aggregates for concrete; Chapter 7 - Chemical admixtures for concrete; Chapter 8 - Reinforcement; Chapter 9 - Properties of concrete;...

245p giangdongdinh 28-05-2024 5 2   Download

Continued part 1, part 2 of ebook "Civil engineering materials" has presents the following content: testing wet and hardened concrete; creep, shrinkage, and cracking of concrete; admixtures for concrete; durability of concrete structures; production of durable concrete; assessment of concrete structures; mortars and grouts; special concretes; alloys and nonferrous metals; bituminous materials; adhesives and sealants; comparison of different materials; photocatalytic admixtures;...

267p dieptieuung 20-07-2023 12 2   Download

This is due to the reduction of calcium hydroxide and the increase of secondary CSH in the cement matrix from the pozzolanic reaction of a mineral admixture. The result of the study with modern experiment methods confirmed the improvement of strength and durability for hardened cement using mineral admixture, thereby ensuring the good applicability of the additional admixtures used in concrete of marine structures.

8p vimalfoy 08-02-2023 6 2   Download

This paper reviews healing materials, the self-healing process, and the mixing method of self-healing concretes using bacteria, mineral admixtures, and fibers. The bacteria such as Bacillus sphaericus, Bacillus megaterium, Bacillus subtilis, Bacillus pasteurii, and Bacillus subtilis can produce a calcareous product for healing exterior cracks through microbial metabolic processes.

8p vibentley 08-09-2022 6 4   Download

This paper presents the effect of additive compounds on concrete used for the construction of hydraulic structures. The results showed that the use of fly ash replacing 10% of cement content has diminished both slump value and compressive strength of concrete.

7p visherylsandber 04-07-2022 7 2   Download

Using conventional concrete for coastal protection structures will often lead to reduce its life service. To address this limitation, the paper presents the method by using glass fiber reinforcement in combination with several types of admixture to produce concrete.

8p visherylsandber 04-07-2022 12 2   Download

Concrete members used for protecting seadike slope have to be suffered from a severe attack caused by both chemical composition of seawater and mechanical action of wave and current, leading to the decrease in durability and lifetime rapidly. In order to address this problem, this paper presents the method by using a combination of various types of admixtures to improve both corrosion and abrasion resistance for concrete, thus producing the product with higher durability and extending longer lifetime.

9p caygaolon 31-10-2019 12 0   Download

In this study, PP fibers and air entraining admixture (AEA) were used together in an high performance concrete (HPC) mix so as to create interconnected reservoirs in concrete and to improve fire performance of HPC. For this reason, nine mixes of HPC incorporating blast furnace slag with 0.24 water-to-binder ratio and various PP and AEA contents were produced. Specimens were cast in two different sizes in order to see the effect of size and 18 series of specimens were obtained.

12p christian2605 10-10-2019 20 1   Download

That is suitable for the restoration of concrete structures in general and hydraulic structures in particular of Vietnam. The dry mixed mortar is manufactured and in bag of 15±0.5 kg weight. Keywords: dry mixed cement mortar, compressive strength, shrinkage, flexural strength, adhesion, watertightness, high range water reducing admixture (HRWR), polymer acrylic.

13p thienthanquydu 21-10-2018 38 1   Download

With the exception of admixtures and fly ash, all moulds and materials are discussed in this chapter. None of the factors listed can be considered in isolation since variation in one will often affect another. Mix design for various forms of precast manufacture is dealt with in Chapter 6. The purpose of this chapter is to acquaint the reader with all the starting variables. The background picture will then be fully understood before one proceeds to put these variables into a process, in order to produce a precast concrete product....

223p 326159487 18-05-2012 131 18   Download

Instructions: Check each test method for which you are requesting accreditation. NVLAP Code ADMIXTURES _____ 02/A35 _____ 02/A36 ASTM C233 ASTM C311 Testing Air-Entraining Admixtures for Concrete Sampling and Testing Fly Ash or Natural Pozzolans for Use as a Mineral Admixture in Portland Cement Concrete Effectiveness of Mineral Admixtures in Preventing Excessive Expansion of Concrete Due to the AlkaliAggregate Reactions Test Method Designation.

10p kien098 03-02-2011 179 39   Download