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The effects of carboxymethylcellulose (CMC) polymer with some other additives on Class G cement were investigated to design a slurry for a field in the south of Iran subject to tectonically ...
Cementing security is endangered by the abnormal gelation phenomenon of cement slurry incorporating polycarboxylic additives occurred around 120 °C.
other common cement additives such as fluid loss polymers. Up until now, only very limited amounts of PCE superplasticizers are used in oil well cementing, because of the overall good performance of AFS. At first, the dispersing effectiveness of chemically different PCE polymers (MPEG, APEG and IPEG types) was compared
Concrete Strengthening by Introducing Polymer-Based Additives into the Cement Matrix—A Mini Review. Weronika Kujawa, 1, 2, * Ewa Olewnik-Kruszkowska, 1, * and …
The modern types of concrete are a mixture of aggregates, cement, water and optional additives and admixtures. In particular, polymer additives seem to be a promising type of component that can significantly …
The state of the art in cementing technology [[1], [2], [3]] and recent developments are sketched out in the literature [4, 5].A discussion about the details of special cement formulations can be found in several monographs [6, 7].The movement of gas from the subterranean zone through the cement slurry during and after primary cementing is …
The formulations used involved the same water-cement ratio as in the previous samples evaluated. In addition, two independent samples were evaluated with a concentration of 35% by weight of cement (BWOC), one consisting of basic (pristine) cement, the other consisting of cement containing CNT-MMA additive 3% BWOC.
The production of Portland cement is responsible for 7% of global CO 2 emission [].This results from the fact, that concrete is the second most used material in the world [].Hence, to reduce carbon footprint there is a need to introduce some alternative construction materials but also to improve the lifespan of conventional concrete as much as possible.
Polymer compounds have become a popular choice for the synthesis of novel products and are being used in cementitious mixtures principally for altering the properties in the fresh state and as repair materials. …
Overview on Cement and cement types, its manufacturing process and mineral additives. Looking for cements and cement additives? Cement is a binding that sets, hardens, and adheres to other material to bind them together. It is manufactured through a closely controlled chemical combination of calcium, silicon, aluminum, iron and other ingredients.
Superabsorbent polymers (SAP) are a new, promising class of chemical admixtures which offer new possibilities in respect of influencing the properties of cement-based materials in the fresh, hardening, and hardened states. Much research work has been done in the last two decades to set the stage for introducing this truly multipurpose agent into the practice …
1. Introduction. The structure of oil and gas wells is a reinforced set of protected steel casings with a surrounding strong cement sheath, which offers a durable channel for the safe and controlled extraction of hydrocarbon fluids. 1 Due to the exorbitant costs of wellbore construction, the practical implementation of the wellbore structure is planned with the …
5. Mineral Additives (e.g., Fly Ash, Silica Fume, GGBFS): Purpose: Mineral additives serve as partial replacements for or supplements to Portland cement, contributing to improved concrete …
The other reasons are the polycarboxylic additives combine ... A large number of additives and admixtures are mixed into the cement system to adjust the performance of cement slurry. Polymer-based additives are particularly used in the well cementing operation over the past decades to meet the special requirements in harsh borehole ...
Powerful synergies between phosphonate, zinc oxide, and acrylamido-tert-butyl-sulfonate (ATBS) copolymer chemical additives render superior performance in a high-temperature retarder system for oil well grade Portland cement. The phosphonate retarder and ATBS-based retarders establish a two-tiered strength development where amorphous C-S-H …
A cementing composition is described useful in cementing oil, gas and water wells comprising: (a) water; (b) hydraulic cement; and (c) a fluid loss additive in an amount effective to reduce fluid ...
PDF | On Feb 21, 2014, Oyewole Taye Salami published Synthesis and Working Mechanism of Humic Acid Graft Copolymer Fluid Loss Additives Suitable for Cementing High Pressure / High Temperature Oil ...
With the advancement of human society, more construction and building materials are required to produce sustainable construction. The advancement of polymer materials and …
Facebook34Tweet0Pin0LinkedIn0 Cementing in the oil and gas industry involves a meticulous process, and cementing additives play a crucial role in fine-tuning the properties of cement slurries. These additives are carefully selected to control slurry density, rheology (flow behavior), fluid loss, and to impart specialized characteristics for ...
The brief historical background on superplasticizers - polymer additives based on polycarboxylate ethers (PCE) are exposed in the paper. Prerequisites for changing the classification of plasticizers are represented. ... and concrete and other cement systems occupy one of the leading positions in this area, chemical additives being their ...
Polymer additives for cement composites: a review. Author links open overlay panel V.R. Riley (Professor) a, I. Razl b. Show more. Add to Mendeley ... concretes, or other composites based on inorganic cements such as fibre reinforced systems can be greatly improved by the addition of polymers. Various types of polymers which can be added to ...
When polymers are added to concrete, the resulting material is known as polymer-modified concrete (PMC) or polymer cement concrete (PCC). Products & Markets Find Your Polymer. View All Products ... That is where additives, known as admixtures, come in. Introducing the right additive can alter or improve the qualities of concrete for a specific ...
In this paper, we present a new class of polymer-based expandable cement additive particles which are made of shape memory polymers (SMP). This class of polymers is deigned to expand to the required extent when exposed to temperatures above 50-100°C which is below the temperature of the cementing zone.
International RILEM Conference on Use of Superabsorbent Polymers and Other New Additives in Concrete 15-18 August 2010, Technical University of Denmark, Lyngby, Denmark SELF-SEALING CEMENT-BASED ...
Since there are numerous other potential possibilities of additives to be admixed with cement to enhance the performance of the cement system and it is hard to include all of …
The cellulose-based polymers work as multifunctional additive that reduces the quantity of other additives in cement slurry and ultimately reduces the operational cost of cementing operation. The comparative analysis of this study opens the window for petroleum industry for proper selection of cellulose-based polymer in designing of cement slurry.
Application of polymer additives in wellbore cement. In recent years, a wide range of high-performance polymer additives for wellbore cement slurry have been introduced to meet various needs. These include fluid loss control [1], mechanical strength [2], retarders [3], accelerators [4], anti- [5], and anti-gas migration [6]. Hybrid polymers ...
The cement slurry, also known as cement paste, is a mix of Portland cement, water, and additives. Portland cement was patented in 1824 as artificial cement produced by burning a blend of limestone and clay. It is often referred to as hydraulic cement because it hydrates when mixed with water. It is first a thick slurry.
Polymer additives are like secret ingredients in a chef's recipe; they fine-tune the end product to taste better, or in this case, perform better. Here are a few points to chew on: Stability Boosters: These additives protect plastics from things like sunlight and heat, which can turn a vibrant backyard chair into a brittle eyesore.
