Polymeric superplasticizers based on polycarboxylates for ready-mixed concrete: current state of the art

Wiliński, D.; Łukowski, P.; Rokicki, Gabriel

doi:10.14314/polimery.2016.474

Cited by 19 publications

(13 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…characterized by the highest grafting ratio, while AA-3000 possess the lowest content of side chains due to its highest anionic charge. At a comparable molecular weight, higher anionic charge values are attributed to a longer backbone length of the polymer [15]. Thus, AA-3000 and AA-1100 are polymers with presumably longer backbones than AA-2000 and AM-5800.…”

Section: Identification Of Pce Structural Configurationmentioning

confidence: 97%

Influence of the polymer structure of polycarboxylate-based superplasticizers on the intercalation behaviour in montmorillonite clays

Borralleras¹,

Segura

Aranda

et al. 2019

Construction and Building Materials

View full text Add to dashboard Cite

The influence of polymeric structure of polycarboxylate-ether (PCE) based superplasticizers on the intercalation behavior in sodium montmorillonite clay (Na-MNT) is investigated by performing in-situ X-ray diffraction (XRPD) on fresh, unaltered clay pastes. The use of this technique reveals the real influence of the PCE structure and of the PCE/clay dosage ratio on the expansion profile of the clay. This is not observed with the traditional XRPD methodology performed on dried clay pastes, which shows the same values of d-spacing despite using polymers of diverse structures. It is observed that PCE polymers with long side chains and high side chain density result in larger expansion.Additionally, polymers with a high anionic charge saturate the interlaminar space of montmorillonite at a lower dosage. The experimental results also indicate that clay exfoliation is critical in the intercalation process and the exfoliation tendency of the clay is influenced by the structure of PCE polymers.

show abstract

Section: Identification Of Pce Structural Configurationmentioning

confidence: 97%

Influence of the polymer structure of polycarboxylate-based superplasticizers on the intercalation behaviour in montmorillonite clays

Borralleras¹,

Segura

Aranda

et al. 2019

Construction and Building Materials

View full text Add to dashboard Cite

show abstract

“…The obtained results allowed to formulate a conclusion that the use of the lunar regolith in mortars and micro-mortars has potential, but their qualitative and quantitative compositions should be very precisely selected, especially when trying to develop compositions of lunar mortars with much lower water contents. The new generation superplasticizers (e.g., with hyperbranched polymers [45,46] or polyphosphate comb polymers [47]) of highly improved efficiency in fluidizing could prove useful in increasing lunar regolith content in cementitious composites while maintaining consistency and w/c at reasonable levels.…”

Section: Discussionmentioning

confidence: 99%

Rheological Properties of Lunar Mortars

2021

View full text Add to dashboard Cite

NASA has revealed that they plan to resume manned missions and ensure the permanent presence of people in the so-called habitats on the Moon by 2024. Moon habitats are expected to be built using local resources—it is planned to use lunar regolith as aggregate in lunar concrete. Lunar concrete design requires a new approach in terms of both the production technology and the operating conditions significantly different from the Earth. Considering that more and more often it is assumed that the water present on the Moon in the form of ice might be used to maintain the base, but also to construct the base structure, the authors decided to investigate slightly more traditional composites than the recently promoted sulfur and polymer composites thermally hardened and cured. Numerous compositions of cement “lunar micro-mortars” and “lunar mortars” were made and tested to study rheological properties, namely, the consistency, which largely depend on the morphology of the fine-grained filler, i.e., regolith. For obvious reasons, the lunar regolith simulant (LRS) was used in place of the original Moon regolith. The used LRS mapped the grain size distribution and morphology of the real lunar regolith. It was created for the purpose of studying the erosive effect of dusty regolith fractions on the moving parts of lunar landers and other mechanical equipment; therefore, it simulated well the behavior of regolith particles in relation to cement paste. The obtained results made it possible to develop preliminary compositions for “lunar mortars” (possible to apply in, e.g., 3D concrete printing) and to prepare, test, and evaluate mortar properties in comparison to traditional quartz mortars (under the conditions of the Earth laboratory).

show abstract

“…are It was noticed then that there a lot of substances that can dissolve poly(vinyl chloride) (PVC) [1][2][3]. On the basis of the results of the research, a group of plasticizer compounds was established, which can form durable, flexible materials of PVC useful in practice for various applications [4][5][6][7][8][9][10][11][12]. Plasticization has become one of the basic methods of modification of physical properties of PVC.…”

Section: Innowacyjne Plastyfikatory Oligomeryczne Poli(chlorku Winylu) Do Aplikacji Specjalistycznychmentioning

confidence: 99%

Innovative oligomeric poly(vinyl chloride) plasticizers for specialized applications

Lewandowski¹,

Piszczek

Pieńkowska³

et al. 2020

Polimery

View full text Add to dashboard Cite

The purpose of the work was to determine the properties of poly(vinyl chloride) (PVC) plasticized with a new linear and oligomeric terephthalic acid esters and aliphatic acids in terms of their application as an innovative non-phthalate plasticizers. On the basis of analysis of PVC grain swelling shows that these compounds have plasticizing properties. Plastographometric tests were performed, the glass transition temperature and thermal stability time were analyzed. The mass flow rate (MFR) and mechanical properties of plasticized PVC was determined. Based on the analysis of the results obtained, it can be concluded that both assessed oligoesters can be successfully used for the production of plasticized PVC with utility indicators similar to those of plasticized PVC produced so far.

show abstract

Polymeric superplasticizers based on polycarboxylates for ready-mixed concrete: current state of the art

Cited by 19 publications

References 49 publications

Influence of the polymer structure of polycarboxylate-based superplasticizers on the intercalation behaviour in montmorillonite clays

Influence of the polymer structure of polycarboxylate-based superplasticizers on the intercalation behaviour in montmorillonite clays

Rheological Properties of Lunar Mortars

Innovative oligomeric poly(vinyl chloride) plasticizers for specialized applications

Contact Info

Product

Resources

About